1. Pediatric Oncology Unit, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milan, Italy.
2. Evaluative Epidemiology Unit, Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milan, Italy.
3. Epidemiology Unit, Agency for Health Protection (ATS) of Milan, Milan, Italy.
4. Integrated Cancer Registry of Catania-Messina-Siracusa-Enna, Department of Hygiene and Public Health, Università di Catania, Catania, Italy.
5. Veneto Tumour Registry, Azienda Zero, Padova, Italy.
6. Department of Medicine, University of Padova, Padova, Italy.
7. Hematology-Oncology Division, Department of Women's and Children's Health, Padova University Hospital, Padova, Italy.
8. Romagna Cancer Registry, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST), IRCCS, Meldola (Forlì), Italy-Azienda Usl della Romagna, Forlì, Italy.
9. Unit of Cancer Epidemiology, AO Citta’ della Salute e della Scienza-University of Turin and Center for Cancer Prevention, Turin, Italy.
10. Cancer Registry Unit, Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milano, Italy.
11. Parma Cancer Registry, Oncology Department, Azienda Ospedaliera Universitaria Parma, Parma, Italy.
12. Modena Cancer Registry, AUSL Modena, Modena, Italy.
13. Clinical Epidemiology Unit, Istituto per lo Studio, la Prevenzione e la Rete Oncologica (ISPRO), Firenze, Italy.
14. Liguria Cancer Registry, IRCCS Ospedale Policlinico San Martino, Genova, Italy.
15. Napoli 3 Sud Cancer Registry, Brusciano, Italy.
16. Cancer Registry and Histopathology Department, Provincial Health Authority (ASP), Ragusa, Italy.
17. Umbria Cancer Registry, Public Health section Department of Experimental Medicine, University of Perugia, Perugia, Italy.
18. Tumor Genomics Unit, Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milan, Italy.
19. Hematology/Oncology, Ospedale Pediatrico Bambino Gesù IRCCS, Roma, Italy.