1. 1st Department of Surgery, 417 NIMTS Veterans Hospital of Athens, 10-12 Monis Petraki, 11521 Athens, Greece
2. Department of Surgery, Florina General Hospital, Egnatias 9, 53100 Florina, Greece
3. Department of Radiology, 417 NIMTS Veterans Hospital of Athens, 10-12 Monis Petraki, 11521 Athens, Greece