1. School of Medicine, University of Crete, Heraklion, Crete, Greece
2. Department of Opthalmology, General University Hospital of Heraklion, Heraklion, Crete, Greece
3. Department of Neurosurgery, General University Hospital of Heraklion, Heraklion, Crete, Greece
4. Nicosia Trauma Center, Nicosia General Hospital, Nicosia, Cyprus
5. Department of General Surgery, Chios Hospital, Chios, Greece
6. Department of Surgical Oncology, General University Hospital of Heraklion, Heraklion, Crete, Greece
7. Department of General Surgery, Sparta General Hospital, Sparta, Greece