1. Department of Neurology, Yonsei University College of Medicine, Seoul, Korea.
2. Department of Neurology, Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine, Wonju, Korea.
3. Department of Convergence Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea.
4. Department of Neurology, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Korea.