1. Department of Vascular Surgery, St. Franziskus Hospital Münster, Münster, Germany
2. Clinic of Vascular and Endovascular Surgery, University of Münster, Münster, Germany
3. Ramón y Cajal University Hospital, Ctra Colmenar Viejo, km. 9, 100, 28034, Madrid, Spain
4. Department of Vascular Surgery, Aristotle University of Thessaloniki, Thessaloniki, Greece