title: Simpson's paradox in meta-analysis.
authors.forename: J A
authors.initials: JA
authors.lastname: Hanley
authors.forename: G
authors.initials: G
authors.lastname: Thériault
mesh_terms: D016022:Case-Control Studies; D002648:Child; D015986:Confounding Factors, Epidemiologic; D004574:Electromagnetic Fields / Q000009:adverse effects*; D006801:Humans; D007938:Leukemia / Q000453:epidemiology*; D016015:Logistic Models; D015201:Meta-Analysis as Topic; D009381:Neoplasms, Radiation-Induced / Q000453:epidemiology*; D016017:Odds Ratio