1. Department of Neurology, Kosin University College of Medicine, Kosin University Gospel Hospital and Department of Neurology, National Cancer Center, Korea
2. Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
3. Department of Neurology, The Catholic University of Korea
4. Department of Neurology, National Cancer Center, Korea
5. Department of Neurology, Korea University Hospital, Korea