title: Confounding by indication, histamine-2 receptor antagonists, and gastric cancer.
authors.forename: M D
authors.initials: MD
authors.lastname: Edwardes
authors.forename: M
authors.initials: M
authors.lastname: Baltzan
mesh_terms: D002927:Cimetidine / Q000009:adverse effects*; D015986:Confounding Factors, Epidemiologic; D006635:Histamine H2 Antagonists / Q000009:adverse effects*; D006801:Humans; D013274:Stomach Neoplasms / Q000139:chemically induced*
chemical_list: D006635:Histamine H2 Antagonists; D002927:Cimetidine