title: Helicobacter pylori, gastric ulcer, and duodenal ulcer.
authors.forename: J R
authors.initials: JR
authors.lastname: Graham
mesh_terms: D000328:Adult; D017668:Age of Onset; D000368:Aged; D004381:Duodenal Ulcer / Q000209:etiology*; D016481:Helicobacter Infections / Q000150:complications*; D016480:Helicobacter pylori; D006801:Humans; D013274:Stomach Neoplasms / Q000209:etiology*