title: Point: population stratification: a problem for case-control studies of candidate-gene associations?
authors.affiliation: Department of Preventive Medicine, University of Southern California, Los Angeles, California 90033-9987, USA.
authors.forename: Duncan C
authors.initials: DC
authors.lastname: Thomas
authors.forename: John S
authors.initials: JS
authors.lastname: Witte
mesh_terms: D015982:Bias; D016022:Case-Control Studies; D003710:Demography; D020022:Genetic Predisposition to Disease; D006801:Humans; D009369:Neoplasms / Q000453:epidemiology / Q000209:etiology / Q000235:genetics; D015203:Reproducibility of Results; D012107:Research Design; D018570:Risk Assessment