1. Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
2. Division of Neurosurgery, Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
3. Addenbrookes Hospital, Cambridge University Hospitals, Cambridge, UK
4. University of Bristol, Bristol, UK
5. Barts and the London School of Medicine, Queen Mary University of London, London, UK
6. Sheffield University Teaching Hospitals NHS Trust, Sheffield, UK
7. King’s College Medical School, London, UK
8. University of Buckingham Medical School, Buckingham, UK
9. Royal College of Surgeons of Ireland, Dublin, Republic of Ireland
10. School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
11. Department of Haematology, Cambridge University Hospitals NHS Foundation trust, Cambridge, UK
12. Department of Haematology, St George’s University Hospitals NHS Foundation Trust, London, UK
13. Division of Anaesthesia, University of Cambridge Addenbrooke's Hospital Cambridge, Cambridge, UK