1. Department of Hematology and Pediatric Onco-hematolology, S.C. Pediatria Oncologica; Fondazione IRCCS Istituto Nazionale dei Tumori; Milan Italy
2. Department of Medical Oncology; Candiolo Cancer Institute-FPO IRCCS; Torino Italy
3. Department of Pediatric Hematology and Oncology, A.R.N.A.S. Civico; Di Cristina e Benfratelli; Palermo Italy
4. Department of Pediatrics, Pediatric Oncology and Hematology Unit “Lalla Seràgnoli,”; Ospedale Sant'Orsola Malpighi; Bologna Italy
5. Department of Radiology; Fondazione IRCCS Istituto Nazionale dei Tumori; Milan Italy
6. Pediatric Onco-Hematology, A.O.U. Citta' della Salute e della Scienza; Ospedale Infantile Regina Margherita; Torino Italy
7. Chemotherapy Ward for Musculoskeletal Tumors; Istituto Ortopedico Rizzoli; Bologna Italy
8. Laboratory of Experimental Oncology; Istituto Ortopedico Rizzoli; Bologna Italy