Study on public health aspects of the early diagnosis of chronic bronchitis.
D000293:Adolescent; D000328:Adult; D000368:Aged; D001991:Bronchitis / Q000175:diagnosis* / Q000453:epidemiology / Q000401:mortality; D002908:Chronic Disease; D005060:Europe; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011634:Public Health