1. Department of Vascular Surgery, ‘Demokritus’ University of Thrace, University Hospital of Alexandroupolis, Alexandroupolis, Greece
2. Department of Vascular Surgery, University of Crete Medical School, University Hospital of Heraklion, Heraklion, Greece
3. First Surgical Clinic, General Hospital ‘G. Papanikolaou’, Exohi, Thessaloniki, Greece