1. 3rd Department of Surgery, “AHEPA” University Hospital, Medical School, Aristotle University of Thessaloniki, 54453 Thessaloniki, Greece
2. Surgery Department, Genesis Private Hospital, 54301 Thessaloniki, Greece
3. Surgery Department, General Clinic Euromedica, 54645 Thessaloniki, Greece
4. 1st Department of Surgery, Attica General Hospital “Sismanogleio-Amalia Fleming”, 57889 Athens, Greece
5. Oncology Department, General Hospital of Rhodes, 86775 Rhodes, Greece
6. University Surgery Department, University General Hospital of Alexandroupolis, 68100 Alexandroupolis, Greece
7. Gastroenterologist, Private Cabinet, 55236 Thessaloniki, Greece