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