1. Department of Neurology, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul 06973, Korea
2. Department of Laboratory Medicine, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul 06973, Korea
3. Department of Neurology, Inha University Hospital, Inha University College of Medicine, Incheon 22332, Korea
4. Department of Neurology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul 03080, Korea