1. Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Str. 6, 97080 Würzburg, Germany
2. Institute of Anatomy and Cell Biology, University of Würzburg, Koellikerstr. 6, 97070 Würzburg, Germany
3. Department of Radiology, University Hospital, LMU Munich, Ziemessenstraße 6, 80336 Munich, Germany