1. Department of Neurology and Cerebrovascular Center, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
2. Department of Neurology, Seoul Medical Center, Seoul, Korea.
3. Department of Neurology, Inje University Ilsan Paik Hospital, Goyang, Korea.
4. Uijeongbu Eulji Medical Center, Eulji University School of Medicine, Uijeongbu, Korea.
5. Department of Neurology, Soonchunhyang University Hospital Seoul, Seoul, Korea.
6. Department of Neurology, Hallym University Sacred Heart Hospital, Anyang, Korea.
7. Department of Biostatistics, Korea University College of Medicine, Seoul, Korea.
8. Department of Neurology, Dongguk University Ilsan Hospital, Goyang, Korea.
9. Department of Neurology, Eulji University, School of Medicine, Daejeon Eulji Medical Center, Daejeon, Korea.
10. Department of Neurology, Yeungnam University Medical Center, Daegu, Korea.
11. Department of Neurology, Dong-A University Hospital, Busan, Korea.
12. Department of Neurology, Chonnam National University Hospital, Chonnam National University Medical School, Gwangju, Korea.
13. Department of Neurology, Jeju National University Hospital, Jeju National University College of Medicine, Jeju, Korea.
14. Department of Neurology, Keimyung University Dongsan Hospital, Daegu, Korea.
15. Department of Neurology, Chuncheon Sacred Heart Hospital, Chuncheon, Korea.
16. Department of Neurology, Chungbuk National University Hospital, Chungbuk National University College of Medicine, Cheongju, Korea.
17. Department of Neurology, Nowon Eulji Medical Center, Eulji University School of Medicine, Seoul, Korea.
18. Department of Neurology, Chung-Ang University Hospital, Seoul, Korea.
19. Department of Neurology, Korea University Guro Hospital, Seoul, Korea.
20. Clinical Research Center, Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.