1. 3rd Department of Surgery, National and Kapodistrian University of Athens, School of Medicine, Attikon Hospital, Athens 12462, Greece
2. 2nd Department of Pathology, National and Kapodistrian University of Athens, School of Medicine, Attikon Hospital, Athens 12462, Greece
3. 1st Department of Surgery, National and Kapodistrian University of Athens, School of Medicine, Laiko Hospital, Athens 11527, Greece
4. Department of General Surgery, General Hospital/Health Center of Ierapetra, Crete 77200, Greece