1. Department of Medicine, Graduate School, Kyung Hee University, Seoul, Korea
2. Statistics and Data Center, Samsung Medical Center, Seoul, Korea
3. Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
4. Neuroscience Center, Samsung Medical Center 06351, Seoul, Korea
5. Department of Neurology, Chonbuk National University Medical School and Hospital, Jeonju, Korea
6. Department of Neurology, Kangwon National University Hospital, Kangwon National University College of Medicine, Chuncheon, Korea
7. Department of Neurology, Kyung Hee University Hospital, Seoul, Korea
8. Departments of Psychiatry, Neurology, Epidemiology and Biostatistics, University of California, San Francisco, CA, USA
9. Department of Biomedical Engineering, Hanyang University, Seoul, Korea
10. Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, Seoul, Korea
11. Clinical Research Design and Evaluation, SAIHST, Sungkyunkwan University, Seoul, Korea