1. Department of Medical Genetics, St Mary's Hospital, Manchester, UK
2. Los Angeles, CA, USA
3. Department of Otolaryngology, Southern General Hospital, Glasgow, UK
4. Centre for Sterotactic Radiosurgery, Royal Hallamshire Hospital, Sheffield, UK
5. Department of Otolaryngology, Guy's Hospital, London, UK
6. Department of Otolaryngology, Manchester Royal Infirmary, Manchester, UK
7. Department of Neurosurgery, Hope Hospital, Manchester, UK
8. Department of Medical Genetics, Churchill Hospital, Oxford, UK
9. Department of Neurosurgery, John Radcliffe Hospital, Oxford, UK
10. Department of Neurosurgery, Guy's Hospital, London, UK
11. Department of Otolaryngology, Selly Oak Hospital, Birmingham, UK
12. Department of Neurosurgery, Addenbrookes Hospital, Cambridge, UK
13. Department of Neurology, Guy's Hospital, London, UK
14. Department of Otolaryngology, Addenbrookes Hospital, Cambridge, UK