1. Laboratory of Experimental Surgery and Surgical Research N.S. Christeas, National and Kapodistrian University of Athens, Athens, Greece
2. Department of Pathology, National and Kapodistrian University of Athens, Athens, Greece
3. Second Department of Surgery, Laiko Univesity Hospital, National and Kapodistrian University of Athens, Athens, Greece
4. Department of Paediatric Surgery, “ATTIKON” University General Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece