1. From the Medical Faculty of the Charité (W.U., J.J., M.S., F.C.L., R.D., M.G.F.), Franz Volhard Klinik HELIOS Klinikum-Berlin at the Max Delbrück Center for Molecular Medicine, Berlin, Germany; GE Medical Systems (T.N.), Applied Science Laboratory, Boston, Mass; and Stephenson CHR Center, Departments of Cardiac Sciences and Radiology (M.G.F.), University of Calgary, Canada.