title: [Letter: Progress in the therapy of duodenal ulcer. How should one prove it?].
mesh_terms: D004341:Drug Evaluation; D004381:Duodenal Ulcer / Q000188:drug therapy*; D006801:Humans; D008787:Metoclopramide / Q000627:therapeutic use*
chemical_list: D008787:Metoclopramide
vernacular_title: Fortschritte in der Therapie des Ulcus duodeni. Wie soll man das beweisen?