1. From the Laboratory of Cardiac Energetics, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, Md (M.Y.C., A.E.A.); InCor Heart Institute, University of São Paulo Medical School, Brazil, São Paulo, Brazil (C.E.R.); Johns Hopkins Hospital and School of Medicine, 600 N Wolfe St, Blalock 524, Baltimore, MD 21287 (A.A., R.T.G., J.M.M., A.L.V., R.J.C., V.C.M., J.A.B., J.A.C.L.);...