1. Department of Medicine (R.R.K., A.S.D., P.O., D.V., S.H.G.), Johns Hopkins University, Baltimore, Maryland 21287
2. Department of Epidemiology and Population Genetics (M.F.), Centro Nacional Investigación Cardiovascular, 28029 Madrid, Spain
3. Department of Epidemiology and Prevention (A.B.), Wake Forest University, Winston-Salem, North Carolina 27157
4. Department of Epidemiology (S.M.G.), American Cancer Society, Atlanta, Georgia 30303
5. Department of Epidemiology (S.H.G.), Johns Hopkins University, Baltimore, Maryland 21287