1. Department of Neurology, Keimyung University Dongsan Hospital, Daegu, South Korea
2. Department of Neurology, Centre Hospitalier Emile Mayrisch, Esch-sur-Alzette, Luxembourg
3. Department of Neuro-otology, Division of Brain Sciences, Imperial College London, Charing Cross Hospital Campus, London, UK
4. Department of Neurology, Schlosspark-Klinik, Berlin, Germany
5. Department of Otolaryngology, University Hospital Lucus Augusti, Lugo, Spain
6. Departments of Psychiatry and Psychology and Otorhinolaryngology – Head and Neck Surgery, Mayo Clinic, Rochester, MN, USA
7. Department of Neurology and German Center for Vertigo and Balance Disorders, Ludwig Maximilians University, Munich, Germany
8. Department of Neurology, Seoul National University College of Medicine, Dizziness Center, Seoul National University Bundang Hospital, Seongnam, South Korea