1. Pediatric Unit; Fondazione IRCCS Istituto Nazionale dei Tumori; Milan Italy
2. Hematology-Oncology Division; Department of Pediatrics; Padova University Hospital; Padova Italy
3. Division of Pediatric Surgery; Department of Pediatrics; Padova University Hospital; Padova Italy
4. Unit of Hereditary Digestive Tract Tumours; Department of Preventive and Predictive Medicine; Fondazione IRCCS Istituto Nazionale dei Tumori; Milan Italy
5. Colorectal Surgery Unit; Department of Surgery; Fondazione IRCCS Istituto Nazionale dei Tumori; Milan Italy
6. Department of Pediatric Surgery; Buzzi Hospital; Milan Italy
7. Pediatric Hematology/Oncology; Fondazione IRCCS Policlinico San Matteo; Pavia Italy
8. Department of Women's and Children's Health; Pediatric Surgery Unit; Padova University Hospital; Padova Italy
9. Hematology/Oncology; IRCCS Ospedale Pediatrico Bambino Gesù, Rome, Italy
10. Department of Pediatric Surgery; IRCCS Ospedale Pediatrico Bambino Gesù, Rome; Italy
11. Pediatric Onco-Hematology; Stem Cell Transplantation and Cellular Therapy Division; Regina Margherita Children's Hospital; Torino Italy
12. Medical Oncology Department; Fondazione IRCCS Istituto Nazionale dei Tumori; Milan Italy
13. Pediatric Oncology Unit; G. Di Cristina Children's Hospital; Palermo Italy