1. From the Victor Chang Cardiac Research Institute (R.M.G.), St Vincent’s Hospital, Sydney, Australia; the Department of Molecular Cardiology (D.M.P., J.H.), Research Institute, Cleveland (Ohio) Clinic Foundation; the Department of Physiology and Biophysics (R.M.G., J.H.), Case Western Reserve University School of Medicine, Cleveland, Ohio; and the Department of Pharmacology (M.T.P.), University of Kentucky, Lexington.