1. Pediatric Hematology and Oncology Unit; A.R.N.A.S. Ospedale Civico; Palermo Italy
2. Clinical and Experimental Unit G. Gaslini Children's Hospital; Genoa Italy
3. Department of Sciences for Health Promotion; University of Palermo; Palermo Italy
4. Pediatric Hematology and Oncology Unit, Department of Hematology; Spirito Santo Hospital; Pescara Italy
5. Pediatric Hematology and Oncology Unit, Azienda Policlinico-Vittorio Emanuele; University of Catania; Catania Italy
6. Department of Pediatric Onco-Hematology; University Hospital; Parma Italy
7. MBBM Foundation, Department of Pediatrics; University of Milano - Bicocca; Monza Italy
8. Department of Pediatrics; Central Teaching Hospital Bolzano; Bolzano Italy
9. University of Rome Tor Vergata; Rome Italy
10. Department of Pediatrics; Ospedale Maggiore Policlinico IRCCS; Milan Italy
11. Department of Biomedical Sciences and Human Oncology; Pediatric Section, University "A. Moro" of Bari; Bari Italy
12. Department of Hematology; IRCCS Casa Sollievo della Sofferenza; San Giovanni Rotondo Italy
13. Pediatric Hematology Oncology; Bone Marrow Transplant, Azienda Ospedaliero Universitaria Pisana, S. Chiara Hospital; Pisa Italy
14. Pugliese-Ciaccio Hospital; Catanzaro Italy
15. A.O.R.N. Santobono Pausillipon; Naples Italy
16. Pediatric Science and Surgery Department; Pediatric Onco-Hematology Unit, Hospital Policlinico- Giovanni XXIII; Bari Italy
17. Pediatric Oncology Hematology Unit; S. Maria Della Misericordia Hospital; Perugia Italy
18. Onco-Haematology and Bone Marrow Transplantation Unit; Children's Hospital; Brescia Italy
19. Pediatric Onco-Hematology Department; University of Padova; Padova
20. Flow Cytometry Service; Laboratory of Clinical Chemistry and Microbiology, IRCCS “Ca‘ Granda” Foundation, Maggiore Hospital Policlinico; Milan Italy
21. Department of Pediatric Onco-Hematology; Meyer Children's Hospital; Florence Italy
22. Institute for Maternal and Child Health (I.R.C.C.S) Burlo Garofolo; Trieste Italy
23. Department of Pediatric and Public Health Sciences; University of Torino; Italy