title: [Disputable issues of the classification of gastroduodenal ulcers].
authors.forename: Ia S
authors.initials: IaS
authors.lastname: Tsimmerman
mesh_terms: D004386:Duodenum / Q000473:pathology; D006801:Humans; D010437:Peptic Ulcer / Q000145:classification* / Q000209:etiology / Q000473:pathology; D013270:Stomach / Q000473:pathology
vernacular_title: Spornye voprosy klassifikatsii gastroduodenal'nykh iazv.