1. Anaesthesiology and Intensive Care Medicine, Caritas-Krankenhaus Sankt Josef Regensburg, Germany
2. Institute for Diagnostic and Interventional Radiology, Brandenburg Medical School Theodor Fontane, Brandenburg a.d. Havel, Germany
3. Center for Clinical Studies, University of Regensburg, Germany
4. Anaesthesiology, University Hospital Regensburg, Germany
5. Radiology, University Hospital Regensburg, Germany
6. Department of Diagnostic and Interventional Radiology, Barmherzige Brüder Klinikum Sankt Elisabeth Straubing GmbH, Straubing, Germany