1. Department of Skull Base Surgery, Addenbrooke's Hospital, Cambridge University Hospitals, Cambridge, United Kingdom
2. Department of Ear, Nose & Throat, Addenbrooke's Hospital, Cambridge University Hospitals, Cambridge, United Kingdom
3. Department of Radiology, Addenbrooke's Hospital, Cambridge University Hospitals, Cambridge, United Kingdom
4. Department of Neurosurgery, Addenbrooke's Hospital, Cambridge University Hospitals, Cambridge, United Kingdom