1. Department of Paediatrics and
2. Medical Research Council (MRC) Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom;
3. Department of Haematology, Great Ormond Street Hospital NHS Foundation Trust, London, United Kingdom;
4. Stem Cell Research, Nuffield Division of Clinical Laboratory Sciences, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom;
5. Instituto de Biomedicina y Biotecnología de Cantabria, Universidad de Cantabria–CSIC, Santander, Spain;
6. Josep Carreras Leukemia Research Institute–Campus Clinic, Department of Biomedicine, School of Medicine, University of Barcelona, Barcelona, Spain;
7. Institute of Reproductive and Developmental Biology, Department of Surgery and Cancer, Hammersmith Hospital Campus, Imperial College London, London, United Kingdom;
8. MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, United Kingdom;
9. Centre for Haematology, Department of Medicine, Hammersmith Hospital, Imperial College London, London, United Kingdom;
10. Haematology Theme, Oxford Biomedical Research Centre, Oxford University Hospitals, Oxford, United Kingdom;
11. Institucio Catalana of Recerca i Estudis Avançats, Barcelona, Spain; and
12. Centro de Investigación Biomédica en Red en Cancer–ISCIII, Barcelona, Spain