1. Hematology and Oncology Unit, Department of Women's and Children's Health, University of Padua, Padua, Italy.
2. Pediatric Hematology and Oncology Unit, Department of Pediatrics, Bolzano Hospital, Bolzano, Italy.
3. Fondazione Istituto di Ricerca Pediatrica Città della Speranza, Padua, Italy.