1. From the Division of Epidemiology and Community Health, University of Minnesota, Minneapolis (R.R.H., F.L.L., A.R.F., R.M., S.K., A.A.); University of North Carolina at Chapel Hill (S.K.A., L.R.L.); and Epidemiological Cardiology Research Center, Department of Epidemiology and Prevention, Wake Forest University School of Medicine, Winston Salem, NC (E.Z.S.).