1. Department of Neurosurgery, University Hospitals Birmingham , Birmingham , UK
2. Department of General Surgery , Royal Wolverhampton NHS trust , UK
3. Hall-Edwards Radiotherapy Research Group, Cancer Centre, Queen Elizabeth Hospital , Birmingham , UK
4. Department of Cellular Pathology, University Hospitals Birmingham , Birmingham , UK
5. Department of Speech and Language, University Hospitals Birmingham , Birmingham , UK
6. Department of Neuroradiology, University Hospitals Birmingham , Birmingham , UK
7. Institute of Cancer and Genomic Sciences, University of Birmingham , Birmingham , UK