title: Normal or affected controls in case-control studies of congenital malformations and other birth defects: reporting bias issues.
authors.forename: E B
authors.initials: EB
authors.lastname: Hook
mesh_terms: D015982:Bias; D002140:California / Q000453:epidemiology; D016022:Case-Control Studies; D000013:Congenital Abnormalities / Q000453:epidemiology*; D004812:Epidemiologic Methods; D006801:Humans