title: Choosing cases and controls in neurological research.
authors.forename: C N
authors.initials: CN
authors.lastname: Martyn
mesh_terms: D015982:Bias; D016022:Case-Control Studies; D003430:Cross-Sectional Studies; D006801:Humans; D015994:Incidence; D009422:Nervous System Diseases / Q000453:epidemiology / Q000209:etiology*; D012307:Risk Factors