1. Department of Neurology, Hallym University Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea.
2. Department of Neurology, Ewha Womans University College of Medicine, Seoul, Korea.
3. Department of Neurology, Dong-A Medical Center, Dong-A University College of Medicine, Busan, Korea.
4. Department of Neurology, Pusan National University Hospital, Pusan National University School of Medicine and Medical Research Institute, Busan, Korea.
5. Department of Neurology, Eulji University Hospital, Eulji University School of Medicine, Daejeon, Korea.
6. Department of Neurology, Konyang University College of Medicine, Daejeon, Korea.
7. Department of Neurology, Kangwon National University School of Medicine, Chuncheon, Korea.
8. Department of Neurology, Inha University College of Medicine, Incheon, Korea.