title: Chronic bronchitis in rural hills of Himachal Pradesh, northern India.
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001991:Bronchitis / Q000453:epidemiology*; D002908:Chronic Disease; D005260:Female; D006801:Humans; D007194:India; D008297:Male; D008875:Middle Aged; D012423:Rural Health