1. Department of Neurology, Bobath Memorial Hospital, Seongnam, Korea.
2. Center for Geriatric Neuroscience Research, Institute of Biomedical Science and Technology, Konkuk University School of Medicine, Seoul, Korea.
3. Department of Neurology, Konkuk University School of Medicine, Seoul, Korea.
4. Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
5. Department of Radiology, Konkuk University School of Medicine, Seoul, Korea.
6. Department of Neurology, Kangwon National University Hospital, Kangwon National University, Chuncheon, Korea.