1. Department of Neurology, Yongin Severance Hospital, Yonsei University Health System, Yongin, Korea.
2. Department of Neurology, Yonsei University College of Medicine, Seoul, Korea.
3. Department of Laboratory Medicine, Yongin Severance Hospital, Yonsei University Health System, Yongin, Korea.
4. Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea.
5. Department of Neurology, Gangnam Severance Hospital, Yonsei University Health System, Seoul, Korea.