1. Clinic of Diagnostic and Interventional Radiology, Saarland University Hospital and Saarland University Faculty of Medicine, Homburg, Germany
2. Department of Interventional Radiology, Technical University of Munich, München, Germany
3. Diagnostic and Interventional Radiology, University Hospital of Gießen and Marburg Campus Marburg, Germany
4. Dept. of Diagnostic und Interventional Radiology, Im Pastoratsbusch 49, Bochum, Germany