1. From the Center for Cardiovascular Research, Division of Cardiology, Department of Medicine (J.S.B., V.S., H.-P.T., V.K.T., J.S.B., Y.S., D.L.M.), Washington University School of Medicine, St. Louis, Mo; and Winters Center for Heart Failure Research, Section of Cardiology (N.S., J.W.D., F.G.) and Cardiovascular Sciences (M.L.E.), Baylor College of Medicine, Houston, Tex.