title: Helicobacter pylori in the stomach--a paradox unmasked.
authors.forename: J
authors.initials: J
authors.lastname: Parsonnet
mesh_terms: D017668:Age of Onset; D004381:Duodenal Ulcer / Q000209:etiology*; D005756:Gastritis / Q000209:etiology; D016481:Helicobacter Infections / Q000150:complications*; D016480:Helicobacter pylori; D006801:Humans; D013274:Stomach Neoplasms / Q000209:etiology*; D013276:Stomach Ulcer / Q000209:etiology*