1. Academic Department of Neurosurgery, Addenbrooke's Hospital and the University of Cambridge, Cambridge
2. Wolfson Brain Imaging Centre, Addenbrooke's Hospital and the University of Cambridge, Cambridge
3. University Departments of Radiology, Addenbrooke's Hospital and the University of Cambridge, Cambridge
4. Anaesthesia, Addenbrooke's Hospital and the University of Cambridge, Cambridge
5. National Institute for Neurology and Neurosurgery Queens Square, London