1. Department of Neurology, Soonchunhyang University Hospital Cheonan, Soonchunhyang University College of Medicine, Cheonan, Korea
2. Nuffield Department of Clinical Neurosciences, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
3. Department of Neurology, Neuroscience Center, Samsung Medical Center, Seoul, Korea
4. Department of Neurology, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea
5. Department of Neurology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea
6. Department of Neurology, Kyungpook National University Chilgok Hospital, School of Medicine, Kyungpook National University, Daegu, Korea
7. Department of Neurology, Jeju National University School of Medicine, Jeju, Korea
8. Department of Neurology, Uijeongbu Eulji Medical Center, Eulji University School of Medicine, Uijeongbu, Korea
9. Department of Neurology, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Korea
10. Department of Ophthalmology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
11. Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
12. Department of Health Sciences and Technology, Samsung Advanced Institute for Health Sciences & Technology (SAIHST), Sungkyunkwan University, Seoul, Korea