1. Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
2. Translational Neurosurgery Unit, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
3. Brain Tumour Research Group, University of Bristol, Institute of Clinical Neuroscience, Learning and Research Building, Southmead Hospital, Bristol, UK
4. Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
5. Institute of Clinical Neurosciences, University of Bristol, Southmead Hospital, Bristol, UK
6. Centre for Population Health Sciences, University of Edinburgh, Edinburgh, UK
7. Primary Care Diagnostics, University of Exeter Medical School, College House, St Luke’s Campus, University of Exeter, Exeter, UK