1. Department of Neurology, Inje University Ilsan Paik Hospital, Goyang, Korea
2. Department of Neurology, Inha University School of Medicine, Incheon, Korea
3. Department of Neurology, Soonchunhyang University College of Medicine, Bucheon, Korea
4. Department of Clinical Epidemiology and Biostatistics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
5. Department of Preventive Medicine and Public Health, Ajou University School of Medicine, Suwon, Korea
6. Department of Neurology, Konkuk University Hospital, Konkuk University School of Medicine, Seoul, Korea
7. Department of Neurology, Pusan National University Hospital, Pusan National University School of Medicine and Medical Research Institute, Busan, Korea
8. Department of Neurology, Chonnam National University Medical School, Gwangju, Korea
9. Department of Neurology, Myoungji Hosipital, Goyang, Korea
10. Department of Neurology, Ajou University School of Medicine, Suwon, Korea
11. Department of Neurology, Seoul St.Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea
12. Department of Neurology, Dong-A University College of Medicine, Busan, Korea
13. Deaprtment of Neurology, Gil Medical Center, Gachon University of Medicine and Science, Incheon, Korea
14. Department of Neurology, Konyang University College of Medicine, Daejeon, Korea
15. Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
16. Department of Neurology, Bobath Memorial Hospital, Seongnam, Korea
17. Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea