1. From the Duke Cardiovascular Magnetic Resonance Center (D.W., E.J., H.W.K., E.L.C., C.F.A., Y.K., F.A., S.D., M.P., R.J.K.), Division of Cardiology (D.W., E.J., H.W.K., E.L.C., C.F.A., F.A., S.D., M.P., R.J.K.), and Department of Radiology (R.J.K.), Duke University Medical Center, DUMC-3934, Durham, NC 27710; and Siemens Healthineers, Malvern, Pa (W.R.).