1. Department of Neurology, Gyeongsang National University Hospital, Jinju, Korea.
2. Regional Cardiocerebrovascular Center, Gyeongsang National University Hospital, Jinju, Korea.
3. Department of Neurology, Gil Medical Center, Gachon University, Incheon, Korea.
4. Department of Neurology, Jeju National University School of Medicine, Jeju, Korea.
5. Department of Neurology, Korea Cancer Center Hospital, Seoul, Korea.
6. Department of Neurology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seoul, Korea.
7. Department of Neurology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.