title: [582 cases of perforated gastroduodenal ulcer].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002031:Bulgaria; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010439:Peptic Ulcer Perforation / Q000453:epidemiology*
vernacular_title: Vurkhu 582 sluchaia na peroforirala stomashno-duodenalna iazv.