title: [Endoscopy in ulcer: how often and why?].
mesh_terms: D004381:Duodenal Ulcer / Q000175:diagnosis*; D016145:Endoscopy, Digestive System; D005500:Follow-Up Studies; D016481:Helicobacter Infections / Q000175:diagnosis*; D016480:Helicobacter pylori; D006801:Humans; D010439:Peptic Ulcer Perforation / Q000175:diagnosis; D013276:Stomach Ulcer / Q000175:diagnosis*
vernacular_title: Endoskopie beim Ulkus: Wie oft und warum?