1. Dipartimento di Ematologia e Onco-Ematologia Pediatrica, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
2. Bone Marrow Transplant Service, Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York, USA
3. Division of Pediatric Hematology/Oncology, New York Presbyterian Hospital, Weill Cornell Medical College, New York, New York, USA