1. Department of Neurology, Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea.
2. Department of Neurology, Keimyung University School of Medicine, Daegu, Korea.
3. Department of Neurology, Chonnam National University Hospital, Gwangju, Korea.
4. Department of Neurology, Daegu Catholic University Medical Center, Daegu, Korea.
5. Department of Neurology, School of Medicine, Kyungpook National University, Daegu, Korea.
6. Department of Neurology, Pusan National University School of Medicine, Busan, Korea.
7. Department of Neurology, Konyang University School of Medicine, Daejeon, Korea.
8. Department of Neurology, Chungnam National University Sejong Hospital, Sejong, Korea.