1. From the Translational and Molecular Imaging Institute (C.C., J.-C.C., F.H., J.H.F.R., K.C.B.-S., V.M., J.M., Z.A.F.), the Department of Radiology (C.C., K.C.B.-S., V.M., Z.A.F.), the Center for Comparative Medicine and Surgery (G.G.), and the Zena and Michael A. Wiener Cardiovascular Institute and Marie-Josée and Henry R. Kravis Cardiovascular Health Center (J.-C.C., F.H., J.H.F.R., K.C.B.-S., V.M., V.F., Z.A.F.), Mount Sinai School of Medicine, New York.