Preface |
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ix | |
Contributors |
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xi | |
1 Definitions of asthma and COPD and overlap |
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1 | (12) |
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1 | (1) |
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1 | (1) |
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1.2.1 Traditional method for definition and diagnosis |
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2 | (1) |
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1.2.2 Diagnostic criteria for asthma and COPD |
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2 | (1) |
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1.3 Overlap of asthma and COPD: A new entity? |
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2 | (3) |
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1.3.1 Relevance of identifying and defining ACO |
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3 | (1) |
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1.3.2 Definitions arising from studies |
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3 | (1) |
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1.3.3 Selecting characteristics for defining ACO |
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3 | (1) |
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1.3.4 Definitions and criteria arising from guidelines |
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4 | (1) |
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5 | (1) |
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1.5 Applying definitions to clinical vignettes and related issues |
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6 | (2) |
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1.6 Asthma, COPD, or ACO, does it matter? |
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8 | (1) |
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9 | (1) |
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9 | (4) |
2 Epidemiology of asthma, COPD, and asthma-COPD overlap |
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13 | (10) |
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13 | (1) |
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14 | (1) |
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14 | (1) |
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14 | (1) |
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2.2.3 Morbidity and mortality |
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15 | (1) |
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15 | (2) |
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16 | (1) |
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16 | (1) |
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2.3.3 Morbidity and mortality |
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17 | (1) |
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17 | (2) |
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17 | (1) |
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17 | (1) |
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2.4.3 Morbidity and mortality |
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18 | (1) |
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19 | (1) |
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19 | (4) |
3 The genetics of asthma, COPD, and the asthma-COPD overlap |
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23 | (18) |
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23 | (1) |
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3.2 Clinical vignette: Management |
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24 | (1) |
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24 | (1) |
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3.4 Genetic research methodology |
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24 | (3) |
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3.4.1 Human genetic variation |
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24 | (1) |
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3.4.2 Complex diseases: Genes and environment |
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25 | (1) |
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3.4.3 History of genetic studies |
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25 | (1) |
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25 | (1) |
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3.4.5 GWAS advantages and disadvantages |
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26 | (1) |
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3.4.6 GWAS in asthma, COPD, and ACO |
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27 | (1) |
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3.5 Genetic investigations of asthma |
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27 | (3) |
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27 | (1) |
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3.5.2 ZPBP2/ORMDL3/GSDMB/IKFZ3 |
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28 | (1) |
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29 | (1) |
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3.5.4 IL33 and IL1RL1 regions |
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29 | (1) |
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29 | (1) |
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3.5.6 Additional asthma loci: HLA-DQ, SMAD3, IL13, IL2RB, RTP2 |
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30 | (1) |
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3.5.7 Candidate gene associations |
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30 | (1) |
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3.6 Genetic investigations of COPD |
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30 | (2) |
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30 | (1) |
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3.6.2 CHRNA3/CHRNA5/IREB2 |
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30 | (1) |
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30 | (1) |
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31 | (1) |
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31 | (1) |
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3.6.6 MMP12, RIN3, and TGFB2 |
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31 | (1) |
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3.6.7 AGER/PPT2 and emphysema-associated loci |
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31 | (1) |
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3.6.8 Alpha-1 antitrypsin deficiency and SERPINA1 |
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31 | (1) |
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3.6.9 The United Kingdom Biobank |
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32 | (1) |
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32 | (1) |
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3.7 Genetic investigations of asthma-COPD overlap |
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32 | (1) |
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3.8 Challenges for future genetic studies of ACO |
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33 | (1) |
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3.9 Opportunities for future ACO studies |
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34 | (1) |
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35 | (1) |
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35 | (1) |
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36 | (5) |
4 Asthma-chronic obstructive pulmonary disease overlap: A distinct pathophysiological and clinical entity |
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41 | (12) |
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41 | (1) |
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4.2 Asthma and COPD-Similarities and differences |
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42 | (1) |
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4.3 Pathophysiology of asthma |
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43 | (2) |
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43 | (1) |
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4.3.2 Airway hyperresponsiveness |
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44 | (1) |
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44 | (1) |
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4.3.4 Airway inflammation |
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44 | (1) |
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4.4 Pathophysiology of COPD |
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45 | (1) |
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4.4.1 Airway hyperresponsiveness |
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45 | (1) |
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45 | (1) |
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4.4.3 Cigarette smoke-induced damage |
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45 | (1) |
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4.4.4 Inflammation and remodeling |
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46 | (1) |
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4.5 Pathophysiology of ACO |
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46 | (2) |
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4.5.1 Airway inflammation |
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46 | (1) |
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47 | (1) |
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48 | (1) |
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48 | (2) |
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50 | (3) |
5 Pathophysiology of asthma, COPD, and the overlap |
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53 | (10) |
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55 | (1) |
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56 | (1) |
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5.3 Chronic obstructive pulmonary disease |
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57 | (1) |
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5.4 Physiological features of asthma-COPD overlap patients |
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58 | (1) |
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5.5 Other mechanisms of fixed airflow limitation |
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59 | (1) |
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59 | (1) |
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60 | (3) |
6 Update on the clinical status, genomics, pathophysiology, and treatment of the asthma-COPD overlap |
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63 | (8) |
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63 | (1) |
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6.2 Historical overview of asthma-COPD overlap (ACO) |
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64 | (1) |
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6.3 Eosinophilic and type 2 inflammation in COPD |
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64 | (1) |
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6.4 Mechanism(s) for persistent expiratory airflow limitation in treated, never smoked, chronic asthmatics |
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65 | (1) |
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6.5 Mechanism(s) responsible for the inflammatory and proteolytic lung tissue breakdown in chronic nonsmoking asthmatics |
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66 | (1) |
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6.6 Severity and treatment response as a phenotypic characteristic of ACO |
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67 | (1) |
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67 | (1) |
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67 | (1) |
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68 | (3) |
7 Tobacco: Active and passive smoke exposure |
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71 | (14) |
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72 | (1) |
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7.2 Active smoking and asthma |
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72 | (4) |
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7.2.1 Development of asthma in active smokers |
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72 | (1) |
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7.2.2 Prevalence of cigarette smoking in asthma |
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72 | (1) |
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7.2.3 Clinical outcomes and inflammatory variables in current and former smokers with asthma |
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73 | (3) |
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7.2.3.1 Current symptom control and quality of life |
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73 | (1) |
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7.2.3.2 Chronic mucus hypersecretion |
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73 | (1) |
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7.2.3.3 Exacerbations and health care utilization |
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73 | (1) |
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7.2.3.4 Corticosteroid insensitivity |
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74 | (1) |
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74 | (1) |
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75 | (1) |
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7.2.3.7 Clinical outcomes in former smokers with asthma |
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75 | (1) |
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75 | (1) |
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7.2.3.9 Inflammatory variables |
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75 | (1) |
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7.3 Active smoking and COPD |
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76 | (2) |
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7.3.1 Development of COPD |
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76 | (1) |
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7.3.2 Prevalence of cigarette smoking in COPD |
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77 | (1) |
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7.3.3 Clinical outcomes and inflammatory variables |
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77 | (1) |
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7.3.3.1 Current smokers and former smokers with COPD |
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77 | (1) |
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7.3.3.2 Former smokers with COPD |
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77 | (1) |
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7.4 Active smoking and the overlap syndrome |
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78 | (1) |
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7.4.1 Development of the overlap syndrome |
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78 | (1) |
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7.4.2 Prevalence of cigarette smoking in the overlap syndrome |
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79 | (1) |
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7.5 Passive smoke exposure and asthma |
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79 | (1) |
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7.5.1 Development of asthma |
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79 | (1) |
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7.5.1.1 Children and adolescents |
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79 | (1) |
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79 | (1) |
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7.5.2 Prevalence of exposure to passive smoke |
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79 | (1) |
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7.5.3 Clinical outcomes and inflammatory variables |
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80 | (1) |
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80 | (1) |
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80 | (1) |
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7.5.3.3 Inflammatory variables |
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80 | (1) |
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7.6 Passive smoke exposure and COPD |
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80 | (1) |
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7.6.1 Development of COPD |
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80 | (1) |
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7.6.2 Exposure to passive smoke |
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80 | (1) |
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7.6.3 Clinical outcomes and inflammatory variables |
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80 | (1) |
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81 | (1) |
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81 | (4) |
8 Indoor and outdoor pollutants and allergens |
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85 | (10) |
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85 | (1) |
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8.2 Air pollution background |
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86 | (1) |
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8.3 Common air pollutants |
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86 | (2) |
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88 | (1) |
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8.5 Aeroallergens as pollutants |
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89 | (1) |
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8.6 Outdoor pollen, spores, and hay fever |
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89 | (1) |
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90 | (1) |
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8.8 Indoor air pollutants and allergens |
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90 | (1) |
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91 | (1) |
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91 | (4) |
9 The microbiome in asthma, COPD, and asthma-COPD overlap |
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95 | (12) |
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95 | (1) |
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9.2 Contemporary microbiome analytical methods |
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96 | (1) |
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9.3 The gut microbiome and the development of airway disease |
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96 | (2) |
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9.4 The healthy lung microbiome |
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98 | (1) |
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9.5 The lung microbiome in chronic airway disease |
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98 | (2) |
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98 | (1) |
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99 | (1) |
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9.6 The lung microbiome during acute exacerbations |
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100 | (1) |
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9.6.1 Asthma exacerbations |
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100 | (1) |
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100 | (1) |
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9.7 The airway microbiome and asthma-COPD overlap |
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101 | (1) |
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9.8 The lung microbiome as a therapeutic target in chronic airway disease |
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101 | (2) |
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9.9 Antibiotic therapy in acute exacerbations |
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103 | (1) |
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103 | (1) |
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104 | (3) |
10 Exercise in asthma, COPD, and asthma-COPD overlap |
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107 | (14) |
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109 | (1) |
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109 | (4) |
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109 | (1) |
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10.2.2 Prevalence and differential diagnosis |
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109 | (1) |
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10.2.3 Mechanisms of airway responses in asthma |
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109 | (1) |
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10.2.4 Evaluation of EIA/EIB |
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110 | (1) |
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10.2.5 Prevention and treatment |
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111 | (1) |
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10.2.6 Asthma in the high-level athlete: A specific phenotype |
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111 | (1) |
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112 | (1) |
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113 | (3) |
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113 | (1) |
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10.3.2 Symptom perception during exercise |
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113 | (1) |
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10.3.3 Ventilatory limitation |
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113 | (1) |
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10.3.4 Physiological determinants of dyspnea |
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113 | (1) |
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10.3.5 Dynamic hyperinflation |
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113 | (1) |
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10.3.6 Limb muscle fatigue |
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114 | (1) |
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10.3.7 Interactions between limb muscles and the respiratory system |
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114 | (1) |
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10.3.8 Relative contribution of exercise-limiting factors |
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114 | (1) |
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10.3.9 Evaluation of exercise intolerance |
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115 | (1) |
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10.3.10 Prevention and treatments |
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115 | (1) |
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10.3.10.1 Pharmacotherapy |
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115 | (1) |
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10.3.10.2 Exercise training and pulmonary rehabilitation |
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115 | (1) |
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116 | (1) |
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116 | (1) |
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116 | (1) |
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116 | (1) |
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116 | (1) |
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116 | (1) |
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117 | (1) |
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117 | (4) |
11 Occupational-related asthma, COPD, and asthma-COPD overlap |
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121 | (14) |
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121 | (1) |
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122 | (1) |
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122 | (4) |
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11.3.1 Cotton and other textile workers |
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122 | (3) |
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11.3.2 Cotton textile worker with ACO |
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125 | (1) |
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11.3.2.1 Is it cotton dust or endotoxin? |
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126 | (1) |
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11.4 Swine confinement and dairy workers |
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126 | (1) |
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11.4.1 ACO in a cattle feedlot worker |
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126 | (1) |
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127 | (1) |
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11.5.1 Other organic dust exposures |
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128 | (1) |
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128 | (1) |
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11.6.1 ACO in a biomass smoke-exposed worker |
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128 | (1) |
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129 | (1) |
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11.7.1 ACO in a rail worker exposed to diesel exhaust and irritants |
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129 | (1) |
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130 | (1) |
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130 | (1) |
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130 | (1) |
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11.10 Summary and conclusions |
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131 | (1) |
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132 | (1) |
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132 | (3) |
12 Asthma, COPD, and asthma-COPD overlap in special populations |
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135 | (10) |
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135 | (1) |
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12.2 Illustrative clinical vignettes |
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135 | (1) |
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12.3 Effect of age on asthma, COPD, and ACO |
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136 | (2) |
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136 | (2) |
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138 | (1) |
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12.3.3 Age and asthma-COPD overlap |
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138 | (1) |
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12.4 Effect of gender on asthma, COPD, and ACO |
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138 | (2) |
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138 | (1) |
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138 | (1) |
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139 | (1) |
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12.5 Effects of pregnancy |
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140 | (1) |
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12.6 Effects of race and ethnicity |
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140 | (1) |
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12.6.1 Race, ethnicity, and asthma |
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140 | (1) |
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12.6.2 Race and ethnicity and COPD |
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141 | (1) |
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12.6.3 Race, ethnicity, and asthma-COPD overlap |
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141 | (1) |
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141 | (1) |
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141 | (4) |
13 History and physical examination of asthma, COPD, and asthma-COPD overlap |
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145 | (14) |
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146 | (11) |
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147 | (1) |
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13.1.2 Physical examination |
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148 | (13) |
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13.1.2.1 Clinical assessment of individuals with confirmed asthma in the outpatient setting |
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149 | (2) |
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13.1.2.2 Asthma in the emergency room: Clinical assessment of an asthma exacerbation |
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151 | (1) |
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13.1.2.3 Initial consultation: Suspected COPD |
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152 | (1) |
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13.1.2.4 Clinical assessment of individuals with COPD in the outpatient clinic |
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153 | (2) |
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13.1.2.5 Clinical assessment of COPD in the emergency room |
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155 | (1) |
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13.1.2.6 Clinical assessment of an individual with suspected ACO |
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156 | (1) |
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157 | (1) |
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157 | (2) |
14 Diagnostic testing for asthma, COPD, and asthma-COPD overlap |
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159 | (10) |
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161 | (1) |
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161 | (1) |
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14.2.1 Forced expiratory volume in one second |
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161 | (1) |
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14.2.2 Forced expiratory volume in one second/forced vital capacity (FEV1/FVC) ratio |
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162 | (1) |
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14.2.3 Postbronchodilator spirometry |
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162 | (1) |
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14.2.4 Forced expiratory flow at 25%-75% of FVC (FEF25-75)/Maximal Midexpiratory Flow |
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162 | (1) |
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14.3 Pulmonary function testing |
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162 | (1) |
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162 | (1) |
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14.3.2 Diffusing capacity of the lungs for carbon monoxide |
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163 | (1) |
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14.3.3 Bronchoprovocation and airway hyperresponsiveness testing |
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163 | (1) |
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14.4 Radiographic studies |
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163 | (1) |
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164 | (2) |
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164 | (1) |
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165 | (1) |
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14.5.2 Serum and sputum biomarkers |
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165 | (7) |
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14.5.2.1 Peripheral eosinophilia |
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165 | (1) |
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14.5.2.2 IgE levels and allergy testing |
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165 | (1) |
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14.5.2.3 Inflammatory cytokines |
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166 | (1) |
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14.6 Exhaled nitric oxide testing |
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166 | (1) |
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166 | (1) |
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167 | (2) |
15 Environmental control of asthma, COPD, and asthma-COPD overlap |
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169 | (12) |
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170 | (1) |
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15.2 Components of outdoor air pollution in urban areas |
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171 | (1) |
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15.3 Pollutants of the indoor environment |
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172 | (2) |
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172 | (1) |
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173 | (1) |
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173 | (1) |
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173 | (1) |
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173 | (1) |
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174 | (1) |
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15.4 Effects of climate change on air pollution and allergenic pollen |
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174 | (1) |
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15.4.1 Thunderstorm asthma and reduction of the risk of asthma crises |
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175 | (1) |
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15.5 Measures to improve outdoor air quality |
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175 | (2) |
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15.5.1 The farm environment is able to reduce the risk of asthma |
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176 | (1) |
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15.6 Measures to improve indoor air quality |
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177 | (1) |
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Conclusions and key points |
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177 | (1) |
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178 | (3) |
16 Medications for asthma, COPD, and asthma-COPD overlap |
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181 | (20) |
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182 | (3) |
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16.1.1 Clinical vignettes |
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182 | (3) |
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185 | (7) |
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16.2.1 Short-acting beta2-agonists |
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185 | (1) |
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185 | (1) |
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185 | (1) |
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185 | (1) |
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185 | (1) |
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185 | (1) |
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16.2.2 Long-acting beta2-agonists |
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186 | (1) |
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186 | (1) |
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186 | (1) |
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186 | (1) |
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186 | (1) |
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186 | (1) |
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16.2.3 Inhaled corticosteroids |
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186 | (1) |
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186 | (1) |
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186 | (1) |
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186 | (1) |
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187 | (1) |
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187 | (1) |
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16.2.4 Leukotriene receptor modifying agents |
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187 | (1) |
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187 | (1) |
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188 | (1) |
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188 | (1) |
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188 | (1) |
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188 | (1) |
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188 | (1) |
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188 | (1) |
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188 | (1) |
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188 | (1) |
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188 | (1) |
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188 | (1) |
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188 | (1) |
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188 | (1) |
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189 | (1) |
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189 | (1) |
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189 | (1) |
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189 | (1) |
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16.2.7 Allergy immunotherapy |
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189 | (1) |
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189 | (1) |
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189 | (1) |
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189 | (1) |
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190 | (1) |
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16.2.8 Long-acting muscarinic antagonist |
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190 | (1) |
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190 | (1) |
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190 | (1) |
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190 | (1) |
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190 | (1) |
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190 | (1) |
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16.2.9 Short-acting muscarinic antagonist |
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190 | (1) |
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190 | (1) |
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190 | (1) |
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190 | (1) |
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190 | (1) |
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190 | (1) |
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16.2.10 Oral corticosteroids |
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191 | (1) |
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191 | (1) |
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191 | (1) |
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191 | (1) |
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191 | (1) |
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191 | (1) |
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191 | (1) |
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191 | (1) |
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191 | (1) |
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192 | (1) |
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192 | (1) |
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192 | (1) |
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192 | (1) |
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192 | (1) |
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192 | (1) |
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192 | (5) |
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192 | (1) |
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192 | (1) |
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193 | (4) |
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197 | (1) |
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197 | (4) |
17 Biologics and emerging therapies for asthma, COPD, and asthma-COPD overlap |
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201 | (8) |
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201 | (4) |
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17.1.1 Discussion of clinical vignette 1 |
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202 | (2) |
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17.1.2 Discussion of clinical vignette 2 |
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204 | (1) |
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205 | (1) |
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205 | (1) |
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205 | (4) |
18 Endoscopic and surgical treatment for asthma, COPD, and asthma-COPD overlap |
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209 | (10) |
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209 | (2) |
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209 | (1) |
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210 | (1) |
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211 | (3) |
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211 | (2) |
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213 | (1) |
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18.3 Asthma-COPD overlap (ACO) |
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214 | (2) |
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214 | (1) |
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215 | (1) |
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216 | (1) |
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216 | (3) |
19 Supplemental oxygen and pulmonary rehabilitation for chronic obstructive pulmonary disease (COPD), asthma, and asthma-COPD overlap |
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219 | (16) |
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219 | (5) |
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19.2 Supplemental oxygen and COPD |
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224 | (1) |
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224 | (1) |
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19.4 Mild resting or nocturnal hypoxemia |
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225 | (1) |
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19.5 Exertional desaturation |
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225 | (1) |
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226 | (1) |
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19.7 Adverse effect of supplemental oxygen |
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226 | (1) |
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226 | (1) |
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19.9 Pulmonary rehabilitation |
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227 | (1) |
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19.10 Pulmonary rehabilitation and COPD |
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228 | (1) |
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19.11 Pulmonary rehabilitation and asthma |
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229 | (1) |
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230 | (1) |
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230 | (5) |
20 Smoking cessation for asthma, COPD, and asthma-COPD overlap |
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235 | (8) |
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235 | (1) |
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20.2 Current smoking cessation guidelines |
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235 | (5) |
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20.2.1 For patients willing to quit |
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236 | (3) |
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236 | (2) |
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238 | (1) |
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239 | (1) |
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20.2.2 For patients unwilling to quit |
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239 | (1) |
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239 | (1) |
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240 | (1) |
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20.3 Special considerations for smoking cessation for patients with asthma and COPD |
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|
240 | (1) |
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20.3.1 Managing withdrawal symptoms |
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|
240 | (1) |
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20.3.2 Comorbid psychopathology |
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241 | (1) |
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20.3.3 Symptom management |
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241 | (1) |
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20.3.4 Smoking cessation medications |
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241 | (1) |
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241 | (1) |
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241 | (2) |
21 Management of acute asthma, COPD, and asthma-COPD overlap |
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243 | (14) |
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21.1 Definition and economic burden |
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243 | (1) |
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243 | (1) |
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244 | (9) |
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21.3.1 Role of patients and primary care providers in the management of asthma, COPD, and ACO exacerbations |
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244 | (1) |
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21.3.2 Role of acute-care facilities in the management of asthma, COPD, and ACO exacerbations |
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245 | (12) |
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248 | (2) |
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21.3.2.2 Chronic obstructive pulmonary disease |
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250 | (2) |
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21.3.2.3 Asthma-chronic obstructive pulmonary disease overlap |
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252 | (1) |
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21.4 Gaps in acute care and research opportunities |
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253 | (1) |
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253 | (4) |
22 Quality of life and health outcomes in asthma, COPD, and asthma-COPD overlap |
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257 | (12) |
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257 | (1) |
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22.1.1 Discussion of clinical vignette |
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258 | (1) |
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22.2 Quality of life in asthma and COPD |
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|
258 | (1) |
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22.3 Clinical presentation of ACO |
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|
259 | (1) |
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22.4 Symptom burden and health status of ACO patients (versus those with COPD and those with asthma) |
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|
259 | (2) |
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22.5 Exacerbations in ACO patients |
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261 | (1) |
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22.6 Prognosis of asthma, COPD, and ACO patients: Trajectory of lung function decline for patients with asthma, COPD, and ACO |
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|
261 | (3) |
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22.7 Proposed management of ACO |
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264 | (1) |
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22.8 Morbidity and mortality in ACO |
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264 | (1) |
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265 | (4) |
23 Asthma, COPD, and asthma-COPD overlap from the primary care physician perspective |
|
269 | (12) |
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23.1 Nature of primary care (general practice) |
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|
270 | (1) |
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23.2 Accurate diagnosis is important |
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|
270 | (2) |
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23.3 The asthma-COPD overlap (ACO) |
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|
272 | (1) |
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272 | (1) |
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23.3.2 Differentiating asthma, COPD, and ACO in primary care |
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272 | (1) |
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23.4 Chronic management in primary care |
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|
272 | (2) |
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|
273 | (1) |
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23.5 Monitoring and follow-up |
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|
274 | (1) |
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275 | (1) |
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276 | (2) |
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|
276 | (1) |
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23.7.2 Non pharmacological treatment |
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|
277 | (1) |
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277 | (1) |
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278 | (1) |
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|
278 | (1) |
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|
279 | (2) |
Index |
|
281 | |