1. Department of Neurology, Yonsei University College of Medicine, Seoul, Korea.
2. Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
3. Department of Neurology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
4. Department of Neurology, Uijeongbu St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
5. Department of Neurology, Korea University Anam Hospital, Seoul, Korea.
6. Department of Neurology, National Medical Center, Seoul, Korea.
7. Department of Neurology, Chungnam National University Hospital, Chungnam National University College of Medicine, Daejeon, Korea.
8. Department of Neurology, Kyungpook National University Chilgok Hospital, School of Medicine, Kyungpook National University, Daegu, Korea.
9. Department of Neurology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
10. Department of Neurology, Dong-A University College of Medicine, Busan, Korea.
11. Department of Neurology, Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, Korea.
12. Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
13. Department of Neurology, National Health Insurance Service Ilsan Hospital, Goyang, Korea.
14. Department of Neurology, Ewha Womans University Seoul Hospital, Ewha Womans University College of Medicine, Seoul, Korea.
15. Department of Neurology, Kyung Hee University Hospital, Kyung Hee University College of Medicine, Seoul, Korea.