1. Department of Neurology, Kyung Hee University Hospital, Seoul, Korea.
2. Department of Neurology, Pusan National University Hospital, Pusan National University School of Medicine and Medical Research Institute, Busan, Korea.
3. Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
4. Neuroscience Center, Samsung Medical Center, Seoul, Korea.
5. Department of Clinical Research Design and Evaluation, SAIHST, Sungkyunkwan University, Seoul, Korea.
6. Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, Seoul, Korea.
7. Department of Neurology, Chungnam National University Hospital, Daejeon, Korea.
8. Department of Neurology, Chuncheon Sacred Heart Hospital, Hallym University College of Medicine, Chuncheon, Korea.
9. Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
10. Department of Neurology, Chonnam National University Medical School, Gwangju, Korea.
11. Department of Neurology, Dong-A Medical Center, Dong-A University College of Medicine, Busan, Korea.
12. Department of Neurology, Eulji University Hospital, Eulji University School of Medicine, Daejeon, Korea.
13. Department of Neurology, Ewha Womans University Mokdong Hospital, Ewha Womans University School of Medicine, Seoul, Korea.
14. Department of Neurology, Seoul National University Bundang Hospital, Seongnam, Korea.
15. Department of Neurology, College of Medicine, Hanyang University, Seoul, Korea.
16. Department of Neurology, Mayo Clinic, Rochester, MN, USA.
17. Stem Cell & Regenerative Medicine Institute, Samsung Medical Center, Seoul, Korea.