1Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, MD
2National Center for Health Statistics, Centers for Disease Control and Prevention, Hyattsville, MD
3AstraZeneca International, Wilmington, DE, formerly with Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, MD
Correspondence to: D. Michal Freedman, PhD, Division of Cancer Epidemiology and Genetics, National Cancer Institute, EPS Rm 7036, 6120 Executive Blvd, National Institutes of Health, Department of Health and Human Services, Bethesda, MD 20892-7238 (e-mail: [email protected]).
