1. Endoscopy Unit, University General Hospital of Alexandroupolis, Democritus University of Thrace, Dragana 68100, Alexandroupolis, Greece
2. 1st Department of Surgery, University General Hospital of Alexandroupolis, Democritus University of Thrace, Dragana 68100, Alexandroupolis, Greece
3. Radiology Department, University General Hospital of Alexandroupolis, Democritus University of Thrace, Dragana 68100, Alexandroupolis, Greece
4. 2nd Department of Surgery, University General Hospital of Alexandroupolis, Democritus University of Thrace, Dragana 68100, Alexandroupolis, Greece