title: [Gastroduodenal ulcer perforation. Study of 2200 cases. 1].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D004381:Duodenal Ulcer / Q000150:complications*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010439:Peptic Ulcer Perforation / Q000453:epidemiology / Q000209:etiology* / Q000601:surgery; D013276:Stomach Ulcer / Q000150:complications*
vernacular_title: Perforación ulcerosa gastroduodenal. Estudio de 2.200 casos (Primera de dos partes).