1. Department of Surgery, University Hospital of Ioannina, Ioannina, Greece
2. Department of Surgery, General Hospital of Filiates, Filiates, Greece
3. Department of Surgery, General Hospital of Ioannina, “G. Xatzikosta”, Ioannina, Greece
4. Department of Ophthalmology, University Hospital of Ioannina, Ioannina, Greece
5. Department of Nursing, University of Ioannina, Ioannina, Greece
6. Department of Radiology, General Hospital of Ioannina, “G. Xatzikosta”, Ioannina, Greece