1. From Division of Cardiovascular Medicine (N.F.H., H.N., C.P., F.F., J.P.C.), Molecular Imaging Program and Bio-X Program, Department of Radiology, (A.D., Z.L., J.C.W., S.S.G.), and Department of Pathology (Y.N.), Stanford University, Stanford, Calif., and Department of Anesthesiology, University of California San Francisco (M.D.R.).