1. Department of Clinical and Interventional Angiology, Knappschaftskrankenhaus Bottrop, Germany
2. Department of Diagnostic and Interventional Radiology, HELIOS Klinikum Wuppertal, University Hospital Witten/Herdecke, Wuppertal, Germany
3. Department of Nephrology and Rheumatology, Knappschaftskrankenhaus Bottrop, Germany
4. Department of Vascular Surgery, Clinical Centre Mittelbaden Rastatt, Germany