title: Helicobacter pylori infection and duodenal ulcer.
authors.forename: G D
authors.initials: GD
authors.lastname: Bell
authors.forename: K
authors.initials: K
authors.lastname: Powell
mesh_terms: D004381:Duodenal Ulcer / Q000382:microbiology*; D016481:Helicobacter Infections / Q000150:complications*; D016480:Helicobacter pylori; D006801:Humans