1. From the Cardiology Division (D.G., V.V.G., A.P.K., J.B.), School of Nursing (S.B.D., C.M.R.), Nephrology Division (J.M.S.), Emory University, Atlanta, GA; Cardiology Division, University of California Los Angeles (G.C.F.); Cardiovascular Division, University of Pennsylvania, Philadelphia, PA (M.J.); and Cardiology Division, Northwestern University, Chicago, IL (M.G., C.Y.).