1. First Department of Surgery, National and Kapodistrian University of Athens, Laikon General Hospital, Athens, Greece
2. Department of Anatomy and Surgical Anatomy, Medical School, National and Kapodistrian University of Athens, Athens, Greece
3. Department of Surgery, General Hospital of Ierapetra, Ierapetra, Greece
4. Department of Vascular Surgery, “Attikon” University Hospital, National and Kapodistrian University of Athens, Athens, Greece