1. Department of Pathology; Istituto Giannina Gaslini; Genova Italy
2. Department of Hematology-Oncology; Istituto Giannina Gaslini; Genova Italy
3. U.O.C. Bioterapie IRCSS A.O.U. San Martino-IST; Istituto Nazionale per la Ricerca sul Cancro; Genova Italy
4. Neuroblastoma Laboratory; Onco/Hematology Laboratory; SDB Department; University of Padova; Pediatric Research Institute; Fondazione Città della Speranza; Padova Italy
5. Department of Pediatrics; University of Padova; Padova Italy
6. Department of Pediatric Oncology; National Cancer Institute; Milano Italy
7. Department of Pediatric Hematology and Oncology; ARNAS Civico Di Cristina Benfratelli Hospital; Palermo Italy
8. Pediatric Oncology and Hematology Unit “Lalla Seràgnoli“; University of Bologna Sant'Orsola-Malpighi Hospital; Bologna Italy
9. Department of Pediatric Hematology-Oncology; IRCCS; Ospedale Bambino Gesù; Rome Italy
10. Department of Epidemiology and Biostatistics; Istituto Giannina Gaslini; Genova Italy