title: Helicobacter pylori: the primary cause of duodenal ulceration or a secondary infection?
authors.forename: M
authors.initials: M
authors.lastname: Hobsley
authors.forename: F I
authors.initials: FI
authors.lastname: Tovey
mesh_terms: D004381:Duodenal Ulcer / Q000453:epidemiology / Q000209:etiology*; D016481:Helicobacter Infections / Q000150:complications* / Q000453:epidemiology; D016480:Helicobacter pylori; D006801:Humans