1. Departments of Otoneurological Surgery and Surgery of the Skull BaseAddenbrooke's HospitalCambridgeUnited Kingdom
2. Molecular Genetics LaboratoryAddenbrooke's HospitalCambridgeUnited Kingdom
3. Department of HistopathologyAddenbrooke's HospitalCambridgeUnited Kingdom
4. Department of PathologyCambridge UniversityCambridge and LondonUnited Kingdom
5. Department of Epidemiology and BiostatisticsInstitute of Child HealthLondonUnited Kingdom
6. Cambridge and LondonUnited Kingdom