1. Department of Neurology, Bundang Jesaeng General Hospital, Daejin Medical Center, Seongnam, Korea
2. Department of Neurology, Ewha Womans University Mokdong Hospital, Ewha Womans University College of Medicine, Seoul, Korea
3. Department of Neurosurgery, Bundang Jesaeng General Hospital, Daejin Medical Center, Seongnam, Korea