1 Jared P. Reis and David C. Goff Jr are with the Division of Cardiovascular Sciences, National Heart, Lung, and Blood Institute, Bethesda, MD. Reto Auer and Mark J. Pletcher are with the Department of Epidemiology and Biostatistics, University of California, San Francisco. Michael P. Bancks is with the Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL. Cora E. Lewis and James M. Shikany are with the Division of Preventive Medicine, Department of Medicine, University of Alabama, Birmingham. Jamal S. Rana and Stephen Sidney are with the Division of Research, Kaiser Permanente Northern California, Oakland.