title: Helicobacter pylori, gastric ulcer, and duodenal ulcer.
authors.forename: H M
authors.initials: HM
authors.lastname: Mitchell
authors.forename: S L
authors.initials: SL
authors.lastname: Hazell
mesh_terms: D017668:Age of Onset; D002681:China / Q000453:epidemiology; D004381:Duodenal Ulcer / Q000453:epidemiology* / Q000209:etiology; D016481:Helicobacter Infections / Q000150:complications*; D016480:Helicobacter pylori; D006801:Humans; D015995:Prevalence; D012307:Risk Factors; D013274:Stomach Neoplasms / Q000453:epidemiology* / Q000209:etiology