1. Department of Neurology, College of Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Korea.
2. Department of Neurology, University of Ulsan College of Medicine, Ulsan University Hospital, Ulsan, Korea.
3. Department of Neurology, Keimyung University School of Medicine, Daegu, Korea.
4. Department of Neurology, Pusan National University Hospital, Pusan National University School of Medicine, Biomedical Research Institute, Busan, Korea.
5. Department of Neurology, Biomedical Research Institute, Seoul National University Bundang Hospital, Seongnam, Korea.