1. Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany;
2. Department of Genetics, Robert Debré Hospital, Assistance Publique–Hôpitaux de Paris (AP-HP), Paris, France;
3. Saint-Louis Research Institute, Paris-Diderot University, INSERM U1131, Paris, France; and
4. Leukaemia Research Cytogenetics Group, Wolfson Childhood Cancer Centre, Newcastle University, Newcastle upon Tyne, United Kingdom