1. College of Medicine, Kangwon National University, Chuncheon, Republic of Korea
2. Department of Neurology, Kangwon National University Hospital, Chuncheon, Republic of Korea
3. Clinical Neuroscience Center, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
4. Department of Neurology, Seoul National University College of Medicine, Seoul, Korea
5. Department of Neurology, Hallym University Sacred Heart Hospital, Anyang, Republic of Korea
6. Department of Neurology, College of Medicine, Chung-Ang University, Seoul, Republic of Korea