1. Department of Neurology, Cerebrovascular Center, Seoul National University Bundang Hospital, Seoul National University, Seongnam, Korea.
2. Department of Neurology, Samsung Changwon Medical Center, Sungkyunkwan University School of Medicine, Changwon, Korea.
3. Department of Neurology, Seoul Medical Center, Seoul, Korea.
4. Department of Neurology, Soonchunhyang University College of Medicine, Seoul, Korea.
5. Department of Neurology, Eulji General Hospital, Eulji University, Seoul, Korea.
6. Department of Neurology, Eulji University Hospital, Eulji University, Daejeon, Korea.
7. Department of Neurology, Ilsan Paik Hospital, Inje University, Koyang, Korea.
8. Department of Biostatistics, Soonchunhyang University College of Medicine, Seoul, Korea.
9. Department of Biostatistics, Korea University College of Medicine, Seoul, Korea.
10. Department of Neurology, Hallym University College of Medicine, Anyang, Korea.
11. Department of Neurology, Dong-A University College of Medicine, Busan, Korea.
12. Department of Neurology, Yeungnam University Medical Center, Daegu, Korea.