1. Istituto di Ricerca Pediatrico-Fondazione Città della Speranza; Padua Italy
2. Department of Women's and Children's Health; Clinic of Pediatric Hemato-Oncology; University of Padua; Padua Italy
3. Center of Pediatric Hematology Oncology; Azienda Policlinico; Catania Italy
4. Department of Pathology; San Bortolo Hospital; Vicenza Italy