1. Departments of Neurology, Ajou University School of Medicine, Suwon, South Korea
2. Department of Neurology, Neuroscience Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
3. Department of Neurology, School of Medicine, Yonsei University, Seoul, South Korea
4. Department of Neurosurgery, Ajou University School of Medicine, Suwon, South Korea