1. Endoscopy Unit & Inflammatory Bowel Diseases Unit, University General Hospital of Alexandroupolis, Democritus University of Thrace, Alexandroupolis 68100, Greece
2. 1st Surgical Department, University General Hospital of Alexandroupolis, Democritus University of Thrace, Dragana, Alexandroupolis 68100, Greece
3. 2nd Surgical Department, University General Hospital of Alexandroupolis, Democritus University of Thrace, Alexandroupolis 68100, Greece
4. 2nd Department of Internal Medicine, University General Hospital of Alexandroupolis, Democritus University of Thrace, Alexandroupolis 68100, Greece