Cigarette smokers' chronic bronchitis: inhalers and non-inhalers compared.
D000328:Adult; D000367:Age Factors; D001991:Bronchitis / Q000453:epidemiology* / Q000209:etiology; D002908:Chronic Disease; D003371:Cough; D006801:Humans; D008297:Male; D008400:Mass Chest X-Ray; D008875:Middle Aged; D012907:Smoking / Q000150:complications*