title: [Endoscopy in ulcer: how often and why?].
authors.affiliation: Medizinische Klinik I mit Poliklinik, Friedrich-Alexander-Universität Erlangen-Nürnberg.
authors.forename: C
authors.initials: C
authors.lastname: Ell
mesh_terms: D001706:Biopsy; D003937:Diagnosis, Differential; D004386:Duodenum / Q000473:pathology; D016145:Endoscopy, Digestive System; D004947:Esophagus / Q000473:pathology; D005753:Gastric Mucosa / Q000473:pathology; D016481:Helicobacter Infections / Q000150:complications / Q000175:diagnosis; D006801:Humans; D010437:Peptic Ulcer / Q000175:diagnosis* / Q000209:etiology
vernacular_title: Endoskopie beim Ulkus: Wie oft und warum?