1. From the Departments of Cardiovascular Medicine (K.G.T., C.E.P., M.S.L.), Medicine (O.A.-C., A.A.-L.), Nuclear Medicine (R.B.), and Cardiothoracic Surgery (P.M.M., E.H.B.), Cleveland Clinic Foundation, and the Department of Epidemiology and Biostatistics, Case Western Reserve University School of Medicine (M.S.L.), Cleveland, Ohio.