Cigarette smoking and chronic respiratory disease.
D001991:Bronchitis / Q000209:etiology*; D002908:Chronic Disease; D006801:Humans; D008171:Lung Diseases / Q000209:etiology*; D008297:Male; D011656:Pulmonary Emphysema / Q000209:etiology*; D012907:Smoking / Q000150:complications*