1. Cardiothoracic and Vascular Surgery Working Group, Society of Junior Doctors, Athens, Greece
2. Department of Surgery, Saint-Imier Hospital, Saint-Imier, Switzerland
3. UPMC Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
4. Department of Vascular Surgery, Aristotle University of Thessaloniki, Thessaloniki, Greece
5. Department of Vascular Surgery, Stony Brook University School of Medicine, Stony Brook, NY, USA