Chronic bronchitis in non-smokers -does it exist?
D000328:Adult; D001991:Bronchitis / Q000453:epidemiology*; D002908:Chronic Disease; D003371:Cough / Q000453:epidemiology; D004417:Dyspnea / Q000453:epidemiology; D004812:Epidemiologic Methods; D005260:Female; D005387:Finland; D005541:Forced Expiratory Volume; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D012135:Respiratory Sounds; D012907:Smoking; D013997:Time Factors