1. Leukaemia Research Cytogenetics Group, Northern Institute for Cancer Research, Newcastle University, Newcastle-upon-Tyne, United Kingdom;
2. Bristol Genetics Laboratory, Southmead Hospital, North Bristol National Health Service Trust, Bristol, United Kingdom;
3. Department of Paediatric Haematology and Oncology, Bristol Royal Hospital for Children, Bristol, United Kingdom;
4. Children’s Cancer Group, Manchester Academic Health Sciences Centre, Institute of Cancer, University of Manchester, Manchester, United Kingdom;
5. Department of Paediatric Oncology, Tata Translational Cancer Research Centre, Kolkata, India;
6. Department of Haematology, Great Ormond Street Hospital, London, United Kingdom; and
7. Department of Haematology, Sheffield Children’s Hospital, Sheffield, United Kingdom