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Pulmonary Disease, Chronic Obstructive
Asthma
Forced Expiratory Volume
Vital Capacity
Smoking
Smoking Cessation
Questionnaires
Denmark
Risk Factors
Prospective Studies
Cohort Studies
Severity of Illness Index
Longitudinal Studies
Bronchodilator Agents
Albuterol
Hospitalization
Spirometry
Respiratory Function Tests
Administration, Inhalation
Genetic Predisposition to Disease
Co-Publications
31
25
14
11
10
8
7
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