1. Department of Neurology, Park-Klinik Weissensee, Berlin, Germany
2. Department of Otolaryngology - Head and Neck Surgery, Bellvue Hospital, Saint-Etienne, France
3. Institute of Clinical Neuroscience, Ludwig-Maximilian University, Munich, Germany
4. Barrow Neurological Institute, University of Arizona College of Medicine, Phoenix, AZ, USA
5. Department of Otolaryngology - Head and Neck Surgery, Osaka University Graduate School of Medicine, Japan
6. Department of Otolaryngology - Head and Neck Surgery, University of Siena, Italy
7. Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MA, USA