1. Department of Pediatrics, Section of Hematology‐Oncology Baylor College of Medicine Houston Texas USA
2. Texas Children's Cancer and Hematology Centers, Texas Children's Hospital Houston Texas USA
3. Center for Epidemiology and Population Health, Department of Pediatrics Baylor College of Medicine Houston Texas USA
4. Telethon Kids Institute The University of Western Australia Nedlands Western Australia Australia
5. CRESS Université de Paris, INSERM UMR‐1153, Epidemiology of Childhood and Adolescent Cancers Team Villejuif France
6. Center for Environmental Research and Community Health (CERCH), School of Public Health University of California at Berkeley Berkeley California USA
7. Epidemiology and Cancer Statistics Group, Department of Health Sciences University of York York UK
8. Public Health Sciences Division Fred Hutchinson Cancer Research Center Seattle Washington USA
9. Department of Epidemiology, School of Public Health University of Washington Seattle Washington USA
10. National Registry of Childhood Cancers, APHP, Hôpital Paul‐Brousse, Villejuif, and CHU de Nancy Vandoeuvre‐lès‐Nancy France
11. Department of Hygiene, Epidemiology, and Medical Statistics, Medical School National and Kapodistrian University of Athens Athens Greece
12. Hellenic Society for Social Pediatrics and Health Promotion Athens Greece
13. Center for Evidence‐Based Medicine, Department of Health Services, Policy and Practice, School of Public Health Brown University Providence Rhode Island USA
14. Department of Hygiene and Epidemiology University of Ioannina School of Medicine Ioannina Greece
15. Department of Epidemiology and Preventive Medicine, National Liver Institute Menoufia University Cairo Egypt
16. Research Department Children's Cancer Hospital‐57357 Cairo Egypt
17. Division of Epidemiology & Clinical Research, Department of Pediatrics University of Minnesota Minneapolis Minnesota USA
18. School of Public Health University of California Berkeley Berkeley California USA
19. Dipartimento di Medicina Traslazionale, SCDU Epidemiologia del Tumori, Universitá del Piemonte Orientale Novara Italy
20. Environmental and Occupational Epidemiology Branch‐Cancer Risk Factors and Lifestyle Epidemiology Unit Institute for Cancer Research, Prevention and Clinical Network (ISPRO) Florence Italy
21. Department of Preventative and Social Medicine, Dunedin School of Medicine University of Otago Dunedin New Zealand
22. Unidad de Investigación Médica en Epidemiología Clínica, Unidad Médica de Alta Especialidad (UMAE), Hospital de Pediatría, Centro Médico Nacional (CMN) “Siglo XXI,” Instituto Mexicano del Seguro Social (IMSS) Mexico City Mexico
23. Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM) Mexico City Mexico
24. Laboratorio de Genómica del Cáncer, Instituto Nacional de Medicina Genómica Mexico City Mexico
25. Department of Epidemiology, Biostatistics and Occupational Health, Faculty of Medicine McGill University Montréal Québec Canada