title: Duodenal ulcers that are difficult to treat.
authors.forename: J D
authors.initials: JD
authors.lastname: Arnold
mesh_terms: D004381:Duodenal Ulcer / Q000188:drug therapy* / Q000503:physiopathology; D006801:Humans; D009853:Omeprazole / Q000627:therapeutic use*
chemical_list: D009853:Omeprazole