Chronic bronchitis, smoking and social class. A study among working people in the towns of Mid and East Cheshire.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001991:Bronchitis / Q000000981:diagnostic imaging / Q000453:epidemiology*; D002908:Chronic Disease; D004739:England; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012737:Sex Factors; D012907:Smoking / Q000453:epidemiology*; D012923:Social Class