1. From the Departments of Diagnostic and Interventional Radiology (A.K., A.M.W., A.H., T.A.B., B.P.) and Internal Medicine II (S.K.), University Hospital Würzburg, Oberdürrbacherstr 6, 97080 Würzburg, Germany; and Department of Diagnostic Imaging, Siemens Healthcare, Forchheim, Germany (B.K.).