1. From the Laboratory of the Institute of Molecular Cardiobiology (N.S., M.M., A.O., M.A., B.O., E.M.), Johns Hopkins University, Baltimore, Md; Cardiovascular Sciences (S.-H.J., R.-P.X.), Gerontology Research Center, National Institute on Aging, National Institute of Health, Baltimore, Md; and the Experimental Research Laboratory (Y.G., R.B.), Division of Cardiology, University of Louisville and the Jewish Heart and Lung Institute, Louisville, Ky.