1. General and Thoracic Surgery Unit, Department of Surgery, Bambino Gesù Children's Hospital, IRCCS, Rome - Italy
2. Pediatric Oncology Unit, Vito Fazzi Hospital, Lecce - Italy
3. Department of Surgery, “Agostino Gemelli” Catholic University, Rome - Italy
4. Pediatric Hematology and Oncology Unit, Department of Pediatrics, Azienda Ospedaliero-Universitaria di Parma, Parma - Italy
5. Pediatric Hematology and Oncology, Pediatric Clinic, Azienda Ospedaliero-Universitaria Policlinico, Bari - Italy
6. Thrombosis and Hemostasis Unit, Giannina Gaslini's Children Hospital, Genova - Italy
7. Pediatric Hematology Oncology, Azienda Ospedaliera Universitaria Integrata, Verona - Italy
8. Pediatric Surgery Unit, University Policlinic Hospital, Modena - Italy
9. Pediatric Immunology and Bone Marrow Transplantation Unit, San Raffaele Telethon Institute for Gene Therapy (HSR-TIGET), “San Raffaele” Scientific Institute, Milan - Italy
10. Institute for Maternal and Child Health, IRCCS “Burlo Garofolo”, Trieste - Italy