1. From the Department of Radiology, Zuyderland Medical Center, Heerlen/Sittard/Geleen, Henri Dunantstraat 5, 6419 PC Heerlen, the Netherlands (R.M.K.); and Medical Imaging Center, Department of Radiology, Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands (T.C.K.).