1. Hematology and Bone Marrow Transplantation Unit; University of Perugia; Perugia Italy
2. Institute of Pediatric Research Città della Speranza; University of Padua; Padova Italy
3. Pediatric Oncology Hematology-Clinic; University of Padua; Padova Italy
4. Pediatric Oncology and Hematology; SM della Misericordia Hospital; Perugia Italy
5. Institute of Pathological Anatomy; Medical School; University of Perugia; Perugia Italy
6. Surgical Pathology and Cytopathology Unit; Department of Medicine (DIMED); University-Hospital of Padova; Padova Italy