title: Ulcer--suggestions for a new classification.
authors.affiliation: Clinic of Gastroenterology and Liver Diseases, Plovdiv, Bulgaria.
authors.forename: I
authors.initials: I
authors.lastname: Stanchev
mesh_terms: D004381:Duodenal Ulcer / Q000145:classification*; D006801:Humans; D013276:Stomach Ulcer / Q000145:classification*