1. International Agency for Research on Cancer (IARC), Section of Environment and Radiation; Lyon France
2. Department of Epidemiology, Biostatistics, and Occupational Health, Faculty of Medicine; McGill University; Canada
3. University of California, Berkeley, School of Public Health; Berkeley CA
4. Inserm U1153, Epidemiology and Biostatistics Sorbonne Paris Cité Center (CRESS), Epidemiology of Childhood and Adolescent Cancers Team (EPICEA); Villejuif France
5. Paris-Descartes University; UMRS-1153, Epidemiology and Biostatistics Sorbonne Paris Cité Center (CRESS); Paris France
6. RNCE - National Registry of Childhood Cancers; Villejuif; France
7. Department of Health Sciences; University of York; York United Kingdom
8. German Childhood Cancer Registry (GCCR), The Institute for Medical Biostatistics, Epidemiology and Informatics, University Medical Centre, Johannes Gutenberg University Mainz; Mainz Germany
9. Dipartimento di Medicina Traslazionale; Universita` del Piemonte Orientale, AOU Maggiore della Carita` e CPO; Novara Italy
10. Division of Epidemiology Clinical Research; University of Minnesota; Minneapolis MN
11. Department of Pediatrics and Masonic Cancer Center; University of Minnesota; Minneapolis MN
12. Department of Hygiene, Epidemiology and Medical Statistics; National and Kapodistrian University of Athens, Medical School; Athens Greece
13. Telethon Kids Institute, University of Western Australia; Perth Australia
14. Dean's Department and Department of Preventive and Social Medicine; Dunedin School of Medicine, University of Otago; Dunedin New Zealand
15. ISPO-Cancer Prevention and Research Institute, Occupational and Environmental Epidemiology Unit; Florence Italy
16. Sydney School of Public Health, University of Sydney; NSW Australia
17. Sax Institute; Ultimo NSW Australia
18. Curtin University, School of Public Health; Perth Australia
19. Department of Paediatric Haematology-Oncology; Lalla Seràgnoli, Policlinico Sant'Orsola Malpighi; Bologna Italy
20. Department of Pediatric Hematology-Oncology; “Pan.&Agl. Kyriakou” Children's Hospital; Athens Greece
21. Hematology-Oncology Unit, First Department of Pediatrics; Athens University Medical School, “Aghia Sophia” General Children's Hospital; Athens Greece