1. Department of Pediatric Hematology-Oncology and Stem Cell Transplantation, Ghent University Hospital, Ghent, Belgium;
2. Center for Medical Genetics, Ghent University, Ghent, Belgium;
3. Department of Women and Child Health, University of Padova, Padua, Italy;
4. Department of Genetics, University Hospital of Robert Debré and Paris-Diderot University, Paris, France;
5. Division of Pediatric Hematology and Oncology, Department of Pediatrics and Adolescent Medicine, University of Freiburg, Freiburg, Germany;
6. Department of Pediatric Oncology/Hematology, Erasmus MC-Sophia Children’s Hospital, Rotterdam, The Netherlands;
7. Department of Pediatrics, Aarhus University Hospital Skejby, Aarhus, Denmark;
8. Pediatric Hemato-Oncology, University Hospitals Leuven, Leuven, Belgium;
9. Pediatric Hematology and Oncology, University of Bologna, Bologna, Italy;
10. Department of Pediatric Hematology/Oncology, Charles University and University Hospital Motol, Prague, Czech Republic;
11. Princess Maxima Center for Pediatric Oncology, Utrecht, The Netherlands;
12. Dutch Childhood Oncology Group, The Hague, The Netherlands; and
13. Department of Clinical Chemistry, Microbiology, and Immunology, Ghent University Hospital, Ghent, Belgium