1. Division of Clinical Genetics, Department of Laboratory Medicine, Lund University, Lund, Sweden;
2. Laboratory of Hematology, Centre Hospitalier Universitaire (CHU) Lille, Lille, France;
3. Unité Mixte de Recherche en Santé (UMR_S) 1172, INSERM/University of Lille, Lille, France;
4. Division of Laboratory Medicine, Department of Clinical Genetics and Pathology, Skåne University Hospital, Lund, Sweden;
5. Division of Molecular Hematology, Lund Stem Cell Center, Department of Laboratory Medicine, Lund University, Lund, Sweden;
6. Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden;
7. Department of Pediatric Hematology and Oncology, Second Faculty of Medicine, Charles University/University Hospital Motol, Prague, Czech Republic; and
8. Childhood Leukaemia Investigation Prague (CLIP), Prague, Czech Republic