1. Department of Pediatric Surgery, Hopital Universitaire Des Enfants Reine Fabiola (IRIS Group), CHU St Pierre, Brussels, Belgium
2. 1st Department of Surgery, University of Athens, Athens, Greece
3. Experimental and Research Centre, ELPEN Pharma, Athens, Greece
4. 1st Department of Pathology, University of Athens, Athens, Greece
5. University Hospital for Children, Nice, France
6. 2nd Department of Propaedeudic Surgery, University of Athens, Athens, Greece