1. Paediatric Oncology Cinical Studies, The Institute of Cancer Research, Sutton, London;
2. The Royal Marsden Hospital, Sutton, London;
3. Department of Neurosurgery, Leeds General Infirmary, Leeds, UK;
4. Department of Clinical Neuro-oncology, The Christie NHS Foundation Trust, Manchester, UK;
5. Department of Paediatric Oncology, Southampton Children’s Hospital, Southampton, UK