1. From the Department of Medicine, Division of Cardiology (L.D.O., B.B., X.W., M.M.W., J.W., Z.S., D.S., A.J.L., J.A.A.), David Geffen School of Medicine at UCLA, Los Angeles, Calif; and the Department of Medicine (M.H.K., J.D., S.B., A.A.), Nephrology Research and Training Center, University of Alabama at Birmingham.