1. Department of Pathology, Southampton General Hospital, UK,
2. Department of Neuro‐oncology, The Children’s Hospital, Denver, USA,
3. Departments of Pathology,
4. Neurosurgery, Great Ormond Street Hospital, London, UK,
5. Department of Neuropathology, Western General Hospital, Edinburgh, UK,
6. Department of Neuropathology, Frenchay Hospital, Bristol, UK