1. Department of Neurology, Yonsei University Wonju College of Medicine, Wonju, Korea.
2. Department of Neurology and Brain Research Institute, Yonsei University College of Medicine, Seoul, Korea.
3. Department of Neurology, Bundang Jesaeng General Hospital, Seongnam, Korea.
4. Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul, Korea.