1. From the Department of Cardiology (C.Z.), Daping Hospital, Third Military Medical University, Chongqing, People’s Republic of China; Departments of Pediatrics (V.A.M.V., P.A.J.), Internal Medicine (G.M.E.), and Physiology and Biophysics (P.A.J.), Georgetown University Medical Center, Washington, DC; Division of Cardiovascular Medicine (S.M.W.), Vanderbilt University Medical Center, Nashville, Tenn; Department of Pathology (R.A.F.), Virginia University for the Health Sciences, Charlottesville, Va.