title: H. pylori and gastric cancer: limitations of retrospective studies.
authors.forename: E J
authors.initials: EJ
authors.lastname: Kuipers
authors.forename: A S
authors.initials: AS
authors.lastname: Peña
authors.forename: S G
authors.initials: SG
authors.lastname: Meuwissen
mesh_terms: D000367:Age Factors; D000368:Aged; D016481:Helicobacter Infections / Q000150:complications* / Q000453:epidemiology; D016480:Helicobacter pylori / Q000502:physiology*; D006801:Humans; D012189:Retrospective Studies; D013274:Stomach Neoplasms / Q000453:epidemiology / Q000209:etiology* / Q000382:microbiology