title: Chronic bronchitis in rural population.
mesh_terms: D000328:Adult; D000368:Aged; D001991:Bronchitis / Q000150:complications / Q000453:epidemiology*; D002908:Chronic Disease; D005260:Female; D006801:Humans; D007194:India; D008297:Male; D008875:Middle Aged; D012424:Rural Population; D012907:Smoking / Q000150:complications