1. Section of Haemato-Oncology, The Institute of Cancer Research, Sutton, United Kingdom;
2. Department of Pediatrics, Ehime University Graduate School of Medicine, Shitsukawa, Toon, Ehime, Japan;
3. Cancer Research UK Centre for Medical Oncology, St Bartholomew's and the Royal London School of Medicine and Dentistry, London, United Kingdom;
4. Leukaemia Research Cytogenetics Group, Northern Institute for Cancer Research, Newcastle University, Newcastle, United Kingdom; and
5. Paediatric Malignancy Cytogenetics Unit, Great Ormond Street Hospital, London, United Kingdom