1. From the University of California, San Diego, Sulpizio Cardiovascular Center (J.R.W.); the Advanced Cardiovascular Imaging Laboratory (S.M.S., A.E.A., P.B.) and the Cardiothoracic Surgery Research Program (P.C.), National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD; CardioCare, LLC, Chevy Chase, MD (R.J.M., R.S.); Meritus Medical Center, Hagerstown, MD (R.J.M.); and Suburban Hospital, Bethesda, MD (R.S., P.C.).