title: How many patients must we treat for Helicobacter pylori infection to prevent a recurrent duodenal ulcer hemorrhage?
authors.forename: C W
authors.initials: CW
authors.lastname: Howden
mesh_terms: D004381:Duodenal Ulcer / Q000150:complications* / Q000382:microbiology / Q000517:prevention & control; D016481:Helicobacter Infections / Q000150:complications / Q000628:therapy*; D006801:Humans; D010438:Peptic Ulcer Hemorrhage / Q000209:etiology / Q000517:prevention & control*; D012008:Recurrence