1. Department of Otorhinolaryngology, Radboud University Medical Centre, Nijmegen, The Netherlands
2. Department of Audiovestibular Medicine, Guy’s & St. Thomas’ NHS Foundation Trust, London, UK
3. Department of Radiology, Guy’s & St. Thomas’ NHS Foundation Trust, London, UK
4. Department of Otorhinolaryngology, Guy’s & St. Thomas’ NHS Foundation Trust, London, UK