[Chronic bronchitis syndrome. I. Bronchoscopic study].
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001991:Bronchitis / Q000000981:diagnostic imaging / Q000473:pathology*; D001999:Bronchoscopy; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography