1. Pediatric Oncology/Hematology, Erasmus MC–Sophia Children’s Hospital, Rotterdam, The Netherlands;
2. Department of Paediatric Haemato-Oncology, Edmond and Lily Safra Children’s Hospital, Sheba Medical Centre, Tel-Hashomer, Ramat Gan, and Tel Aviv University Medical School, Tel Aviv, Israel;
3. Statistical Office of Berlin-Frankfurt-Münster Study Group, Pediatric Hematology/Oncology, Medical School Hannover, Hannover, Germany;
4. Department of Medical Biosciences, University of Umeå, Umeå, Sweden;
5. Department of Pathology, The Ohio State University, Columbus, OH;
6. Dutch Childhood Oncology Group, The Hague, The Netherlands;
7. Dana-Farber Cancer Institute, Boston, MA;
8. Pediatric and Adolescent Medicine, the Juliane Marie Centre, the University Hospital Rigshospitalet, Copenhagen, Denmark;
9. Pediatric Hematology-Oncology Division, Mackay Memorial Hospital, Taipei, Taiwan;
10. Clinical Research Center, National Hospital Organization, Nagoya Medical Center, Nagoya, Aichi, Japan;
11. Department Pediatric Hematology Oncology, Azienda Ospedaliero-Universitaria Meyer Children Hospital, Florence, Italy;
12. Departement of Pediatrics, Univerty of Milano-Bicocca, Ospedale S. Gerardo, Monza, Italy;
13. Pediatric Hemato-Oncology, Department of Pediatrics “Salus Pueri,” University of Padua, Padova, Italy;
14. Division of Pediatric Hematology/Oncology, Texas Children’s Cancer Center, Baylor College of Medicine, Houston, TX;
15. Department of Pediatrics, University Medical Center Schleswig-Holstein, Campus Kiel, Kiel, Germany;
16. Children's Cancer Research Institute, St. Anna Children’s Hospital, University Medical School Vienna, Vienna, Austria;
17. Department of Pediatric Hemato-Oncology, Ghent University Hospital, Belgium;
18. Assistance Publique, Hôpitaux de Paris, Hôpital Robert Debré, Département de Génétique Université Paris-Denis Diderot, Paris, France;
19. Center of Pediatric Hematology/Oncology, Schneider Children's Medical Center of Israel, Petah Tiqwa, and Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel;
20. Leukaemia Research Cytogenetics Group, Northern Institute for Cancer Research, Newcastle University, Newcastle-upon-Tyne, United Kingdom;
21. Department of Haematology, Sheffield Children’s Hospital, Sheffield, United Kingdom;
22. Department of Pediatrics, University of Colorado School of Medicine and Children’s Hospital, Aurora, CO;
23. Department of Oncology and
24. Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN;
25. Department of Pediatrics, St. Luke's International Hospital, Tokyo, Japan;
26. Clinic of Pediatric Hematology and Oncology, University Medical Center Hamburg–Eppendorf, Hamburg, Germany;
27. Department of Children’s Hematology and Oncology, Medical University, Lublin, Poland; and
28. Division of Haematology/Oncology, the Hospital for Sick Children, University of Toronto, Toronto, Canada