title: The evolution of functional changes in chronic airflow obstruction.
mesh_terms: D000328:Adult; D000402:Airway Obstruction / Q000503:physiopathology*; D001991:Bronchitis / Q000503:physiopathology; D005541:Forced Expiratory Volume; D006801:Humans; D008168:Lung / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D011656:Pulmonary Emphysema / Q000503:physiopathology; D012907:Smoking / Q000503:physiopathology; D014797:Vital Capacity