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