Chronic bronchitis; the effect of cigarette-smoking.
D001991:Bronchitis / Q000209:etiology*; D029481:Bronchitis, Chronic; D006801:Humans; D012906:Smoke; D012907:Smoking / Q000009:adverse effects*; D014026:Nicotiana
D012906:Smoke
BRONCHITIS/etiology and pathogenesis; SMOKING/injurious effects