1. Department of Pediatric Hematology/Oncology and Cell and Gene Therapy, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Ospedale Bambino Gesù, Rome, Italy;
2. Pediatric Hematology/Oncology, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy;
3. Pediatric Hematology-Oncology Unit, Department of Women's and Children's Health, Azienda Ospedaliera-University of Padova, Padova, Italy;
4. Struttura Complessa Laboratorio di Istocompatibilità/Italian Registry of Bone Marrow Donors, Ente Ospedaliero Ospedali Galliera, Genoa, Italy;
5. Pediatric Onco-Hematology, Stem Cell Transplantation and Cellular Therapy Division, Regina Margherita Children's Hospital, Torino, Italy;
6. Immunohaematology and Transfusion Service, Fondazione IRCCS Policlinico S. Matteo, Pavia, Italy;
7. Hematopoietic Stem Cell Unit, Department of Hematology-Oncology, Istituto G. Gaslini, Genova, Italy;
8. Oncology, Hematology and Hematopoietic Stem Cell Transplant Program, Unita' operativa Pediatrics- S. Orsola-Malpighi University of Bologna, Bologna, Italy;
9. Department of Hematology, Azienda Policlinico Umberto I, Sapienza University of Rome, Rome, Italy;
10. Transplantation Unit, Department of Pediatric Oncology, Meyer Children's Hospital, Florence, Italy;
11. Pediatric Hematology Oncology, Azienda Ospedaliera Universitaria Integrata, Verona, Italy;
12. Department of Hemato-Oncology, Santobono-Pausilipon Hospital, Bone Marrow Transplant Unit, Napoli, Italy;
13. Cell Factory, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy;
14. Pediatric Onco-Hematology, Azienda Ospedaliera/Universitaria Pisana, Pisa, Italy;
15. Department of Pediatrics, Institute of Maternal and Child Health, IRCCS Burlo Garofolo Trieste, Trieste, Italy;
16. Bone Marrow Transplantation Unit, Pediatric Department of Milano-Bicocca University, Monza e Brianza per il Bambino e la sua Mamma Foundation, Monza, Italy; and
17. Department of Pediatric Sciences, University of Pavia, Pavia, Italy