1. Department of Neurology, Ewha Womans University College of Medicine, Seoul, Korea.
2. Department of Neurology, Neuroscience Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
3. Department of Neurology, Presbyterian Medical Center, Jeonju, Korea.
4. Department of Neurology, Eulji Hospital, Eulji University, Seoul, Korea.
5. Department of Neurology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.
6. Department of Neurology, Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea.
7. Department of Neurology, Severance Hospital, Seoul, Korea.
8. Department of Neurology, Bundang Jesaeng General Hospital, Daejin Medical Center, Seongnam, Korea.
9. Department of Neurology, Chuncheon Sacred Heart Hospital, Hallym University College of Medicine, Chuncheon, Korea.
10. Department of Neurology, Korea University College of Medicine, Seoul, Korea.
11. Department of Neurology, Chungnam National University College of Medicine, Daejeon, Korea.
12. Department of Neurology, Gyeongsang National University College of Medicine, Jinju, Korea.
13. Department of Neurology, Chung-Ang University Hospital, Seoul, Korea.
14. Department of Neurology, Inje University College of Medicine, Seoul, Korea.
15. Department of Neurology, Seoul Medical Center, Seoul, Korea.
16. Department of Neurology, Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Hwaseong, Korea.