1. Academic Department of Neurosurgery Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham B15 2TT, UK
2. Clinical Trials Unit, Department of Oncology, University of Cambridge, Cambridge CB2 0QQ, UK
3. Department of Radiology, University of Cambridge, and Cambridge University Hospitals NHS Foundation Trust, Cambridge Biomedical Campus, Cambridge CB2 0QQ, UK
4. Department of Neurosurgery, King’s College Hospital, London SE5 9RS, UK
5. Academic Neurosurgery Unit, Department of Clinical Neurosciences, University of Cambridge, Cambridge CB2 0QQ, UK
6. Department of Neurosurgery, Walton Centre, University of Liverpool, Liverpool L9 7LJ, UK
7. Cambridge Clinical Trials Unit—Cancer Theme (CCTU-CT), Cambridge CB2 0QQ, UK
8. Brain Tumour Research Centre, University of Bristol Medical School & North Bristol Trust, Bristol BS10 5NB, UK