1. Department of Vascular Surgery, University Hospital of Larissa, Larissa, Greece
2. Department of Vascular Surgery, University Hospital of Patras, Patras, Greece
3. Department of Vascular Surgery, University Hospital of Alexandroupolis, Alexandroupolis, Greece
4. Department of Vascular Surgery, University Hospital of Heraklion, Crete, Greece
5. Department of Vascular Surgery, “ATTIKON” University Hospital, Athens, Greece
6. Private Vascular Surgeon, Ioannina, Greece
7. Private Vascular Surgeon, Kozani, Greece