Counterpoint: bias from population stratification is not a major threat to the validity of conclusions from epidemiological studies of common polymorphisms and cancer.
Wacholder
Sholom
S
Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, Maryland 20854, USA. Wacholder@nih.gov
Rothman
Nathaniel
N
Caporaso
Neil
N
D015982:Bias; D016022:Case-Control Studies; D003710:Demography; D016021:Epidemiologic Studies; D020022:Genetic Predisposition to Disease; D006801:Humans; D009369:Neoplasms / Q000453:epidemiology / Q000209:etiology / Q000235:genetics; D011110:Polymorphism, Genetic; D015203:Reproducibility of Results; D012107:Research Design