1. From the Department of Diagnostic, Pediatric, and Interventional Radiology, Inselspital University Hospital, Bern, Switzerland (H.C.T., S.B., J.M.F.); and Molecular Imaging Program, National Cancer Institute, National Institutes of Health, 10 Center Dr, Room B3B69F, Bethesda, MD 20892 (B.T., P.L.C.).