Epidemiological study of cholelithiasis among railroad workers in India with special reference to causation.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002769:Cholelithiasis / Q000453:epidemiology* / Q000209:etiology; D004032:Diet; D005260:Female; D005843:Geography; D006801:Humans; D007194:India; D008297:Male; D008875:Middle Aged; D010437:Peptic Ulcer / Q000150:complications; D011890:Railroads; D012737:Sex Factors; D012959:Socioeconomic Factors