1. From the Vanderbilt Translational and Clinical Cardiovascular Research Center (D.M., C.R., T.J.W.), the Division of Cardiovascular Medicine (D.M., C.R., H.G., W.S., T.J.W.), the Division of Epidemiology, Department of Medicine, and Vanderbilt Institute for Clinical and Translational Research (D.W., S.P., P.T., H.M., W.J.B.), Vanderbilt University Medical Center, Vanderbilt University, Nashville; and Franklin Primary Health Center, Mobile, AL (P.U., R.M., C.W.).