1. Department of Molecular Hematopoiesis, Hannover Medical School, Hannover, Germany;
2. Institute of Cell and Molecular Pathology, Hannover Medical School, Hannover, Germany;
3. Pediatric Oncology/Hematology, Erasmus Medical Center/Sophia Children’s Hospital, Rotterdam, The Netherlands;
4. University of Washington, Seattle, WA;
5. Department of Hematology, Erasmus University Medical Center, Rotterdam, The Netherlands;
6. Heinrich-Pette-Institute, Hamburg, Germany;
7. Munich Leukemia Laboratory, Munich, Germany;
8. Department of Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany;
9. Center for Human Genetics, Katholieke Universiteit Leuven/University Hospital Leuven, Leuven, Belgium;
10. Service d'Hémato-Oncologie Pédiatrique, Hopital Trousseau, Paris, France; and
11. Dutch Childhood Oncology Group, The Hague, The Netherlands