Chronic bronchitis--a pilot survey.
D000293:Adolescent; D000328:Adult; D000353:Africa, Southern; D000367:Age Factors; D000368:Aged; D000434:Alcoholic Beverages; D001991:Bronchitis / Q000175:diagnosis / Q000453:epidemiology*; D002648:Child; D002908:Chronic Disease / Q000453:epidemiology; D003139:Common Cold / Q000150:complications; D003371:Cough; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009790:Occupations; D044469:Racial Groups; D012131:Respiratory Insufficiency / Q000150:complications; D012737:Sex Factors; D012907:Smoking; D012959:Socioeconomic Factors; D013896:Thoracic Diseases / Q000150:complications