1. Department of Diagnostic and Interventional Radiology, Medical Faculty, University Dusseldorf, Moorenstrasse 5, D-40225, Düsseldorf, Germany
2. Radiologicum Krefeld, Oberdießemer Straße 96, 47805 Krefeld, Germany
3. Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, University of Duisburg-Essen, D-45147, Essen, Germany
4. Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Ave, Boston, MA, USA
5. RIO - Radiologie Institut Oberhausen, Mülheimer Str. 87, 46045 Oberhausen, Germany
6. Department of Urology, University Hospital Tübingen, Tübingen, Germany
7. Radiologie Münster MVZ, Von-Steuben-Str. 10a, 48143 Münster, Germany