title: Chronic bronchitis and emphysema.
mesh_terms: D000397:Air Pollution; D001991:Bronchitis / Q000453:epidemiology / Q000209:etiology; D006801:Humans; D011656:Pulmonary Emphysema / Q000453:epidemiology / Q000209:etiology; D012129:Respiratory Function Tests; D012907:Smoking