1. Department of Vascular Surgery, University of Zurich (UZH), Raemistrasse 100, CH-8008 Zurich, Switzerland
2. Department of Vascular Surgery, Kantonsspital St. Gallen, CH-9000 St. Gallen, Switzerland
3. Division of Vascular and Endovascular Surgery, Department of Clinical Surgical and Health Sciences, University of Trieste, 34149 Trieste, Italy
4. Department of Vascular and Endovascular Surgery, University Hospital Regensburg, University of Regensburg, 93053 Regensburg, Germany