1. Department of Neurology, College of Medicine, Dong-A University, Busan, Korea.
2. Department of Neurology, College of Medicine, Hallym University, Seoul, Korea.
3. Department of Neurology, School of Medicine, Pusan National University, Busan, Korea.
4. Department of Neurology, School of Medicine, Kinki University, Osaka, Japan.
5. Department of Industrial and Occupational Medicine, Pusan National University School of Medicine, Busan, Korea.
6. Department of Neurology, College of Medicine, Seoul National University, Seoul, Korea.
7. Department of Neurology, School of Medicine, Gyeongsang National University, Jinju, Korea.
8. Department of Neurology, School of Medicine, Kyungpook National University, Daegu, Korea.
9. Department of Neurology, College of Medicine, University of Ulsan, Ulsan, Korea.
10. Department of Neurology, School of Medicine, Keimyung University, Daegu, Korea.
11. Department of Neurology, College of Medicine, Dongguk University, Seoul, Korea.
12. Department of Neurology, School of Medicine, Sungkyunkwan University, Seoul, Korea.
13. Department of Neurology, Chonnam National University Medical School, Gwangju, Korea.
14. Department of Neurology, School of Medicine, Yeungnam University, Daegu, Korea.
15. Department of Neurology, College of Medicine, Yonsei University, Seoul, Korea.
16. Department of Neurology, School of Medicine, Chungnam National University, Daejeon, Korea.
17. Department of Neurology, College of Medicine, Konyang University, Daejeon, Korea.
18. Department of Neurology, College of Medicine, Kosin University, Busan, Korea.
19. Department of Neurology, School of Medicine, Eulji University, Seoul, Korea.
20. Department of Neurology, School of Medicine, Chonbuk National University, Jeonju, Korea.
21. Department of Neurology, College of Medicine, Soonchunhyang University, Seoul, Korea.
22. Department of Neurology, School of Medicine, Chosun University, Gwangju, Korea.