1. Department of Vascular Surgery, St Franziskus Hospital Münster, Germany
2. Clinic of Vascular and Endovascular Surgery, University of Münster, Germany
3. Division of Vascular Surgery, MedStar Union Memorial Hospital, Baltimore, MD, USA
4. Department of Vascular Surgery, New York University Langone Medical Center, New York, NY, USA
5. The Cleveland Clinic, Cleveland, OH, USA
6. Department of Vascular Surgery, University of Kentucky, Lexington, KY, USA