1. Department of General Surgery, University Hospital of Larisa, Mezourlo , Larisa , Thessaly, Greece
2. Department of Radiotherapy/Radiation Oncology, Faculty of Medicine, School of Health Sciences, University of Thessaly, University Hospital of Larissa , Biopolis, Larissa Greece
3. Second Department of Surgery, National and Kapodistrian University of Athens, School of Medicine, Aretaieion University Hospital , Athens , Greece