1. Department of Neurology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
2. Center for Sensorimotor Research, Department of Neurology, Ludwig-Maximilian University Munich, Munich, Germany
3. German Center for Vertigo and Balance Disorders, Ludwig-Maximilian University Munich, Munich, Germany
4. Department of Neurology, Korea University College of Medicine, Korea University Guro Hospital, Seoul, Korea
5. Departments of Neurology, Ophthalmology, Otolaryngology – Head and Neck Surgery, The Johns Hopkins University School of Medicine, Baltimore, MD, USA