1. Department of Pediatric Oncology, Erasmus University Medical Center-Sophia Children’s Hospital, Rotterdam, The Netherlands;
2. Department of Pediatrics, University Medical Center Schleswig-Holstein, Kiel, Germany;
3. Department of Pediatric Hematology and Oncology, Charles University and University Hospital Motol, 2nd Faculty of Medicine, Childhood Leukemia Investigation Prague, Prague, Czech Republic;
4. Clinica Pediatrica, Centro Ricerca Tettamanti, University of Milano-Bicocca, Mona, Italy;
5. European Study for Philadelphia–Acute Lymphoblastic Leukemia Trial Data Center, Department of Health Sciences, University of Milano-Bicocca, Monza, Italy;
6. Department of Women's and Children's Health, University of Padova, Padova, Italy;
7. Leukemia Research Cytogenetics Group, Northern Institute for Cancer Research, Newcastle University, Newcastle upon Tyne, United Kingdom;
8. Department of Genetics, Assitance Publique Hôpitaux de Paris, Hôspital Robert Debré, University Paris Diderot, Paris, France;
9. Children’s Cancer Group, Manchester Academic Health Science Center, University of Manchester, Manchester, United Kingdom; and
10. Dutch Childhood Oncology Group, The Hague, The Netherlands