1. From the Department of Medicine (M.H., P.N., Y.G., P.E.d.A., L.W., D.N., J.C.W.), Division of Cardiovascular Medicine; Department of Radiology (M.H., F.J., S.H., P.E.d.A., L.W., J.C.W.), Molecular Imaging Program; Department of Cardiothoracic Surgery (Y.G., R.C.R.); Department of Pediatrics (M.A.K.); Department of Radiation Oncology (A.J.G.); and Cardiovascular Institute (R.C.R., J.C.W.), Stanford University School of Medicine, Stanford, CA.