1. Department of Neurology Korea University Ansan Hospital Ansan South Korea
2. Department of Neurology Chungnam National University Hospital Daejeon South Korea
3. Research Administration Team Seoul National University Bundang Hospital Seongnam South Korea
4. Dizziness Center, Clinical Neuroscience Center, and Department of Neurology Seoul National University Bundang Hospital Seongnam South Korea
5. Department of Neurology Seoul National University College of Medicine Seoul South Korea