1. Department of Neurology, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Korea.
2. Department of Neurology, Uijeongbu St. Mary’s Hospital, The Catholic University of Korea, Uijeongbu, Korea.
3. Department of Neurology, Ewha Womans University Mokdong Hospital, Ewha Womans University College of Medicine, Seoul, Korea.
4. Department of Neurology, Kangwon National University Hospital, Kangwon National University College of Medicine, Chuncheon, Korea.
5. Department of Neurology, Eunpyeong St. Mary’s Hospital, The Catholic University of Korea, Seoul, Korea.
6. Department of Neurology, Ewha Womans University Seoul Hospital, Ewha Womans University College of Medicine, Seoul, Korea.
7. Department of Neurology, Inha University School of Medicine, Incheon, Korea.