1. Pediatric Oncology Unit; A.R.N.A.S. Ospedali Civico; Di Cristina e Benfratelli; Palermo Italy
2. Pediatric Hematology and Oncology Unit; Catania University; Catania Italy
3. Pediatric Oncology Unit; Fondazione IRCCS Istituto Nazionale Tumori; Milan Italy
4. Pediatric Hematology and Oncology Unit; Pediatric Department; University of Padua; Padua Italy
5. Soft Tissue and Bone Pathology; Histopathology, and Pediatric Pathology Unit; Fondazione IRCCS Istituto Nazionale Tumori; Milan Italy
6. Pediatric Oncology Unit; Pediatric Department; II University; Naples Italy
7. Pediatric Hematology and Oncology Unit “Lalla Seràgnoli”; Bologna University; Bologna Italy
8. Department of Hematology and Oncology; Istituto G. Gaslini; Genoa Italy
9. Molecular Bases of Genetic Risk and Genetic Testing Unit; Department of Preventive and Predictive Medicine; Fondazione IRCCS Istituto Nazionale Tumori; Milan Italy
10. Unit of Neonatology; AOUP “Paolo Giaccone”; Palermo Italy
11. Pediatric Hematology and Oncology Department; Ospedale Pediatrico Bambino Gesù; Rome Italy