1. Department of Neurosurgery; Seoul National University Bundang Hospital; Seongnam-si Korea
2. Department of Neurosurgery; Seoul National University College of Medicine; Seoul Korea
3. Department of Internal Medicine; Seoul National University Bundang Hospital; Seongnam-si Korea
4. Department of Radiation Oncology; Seoul National University Bundang Hospital; Seongnam-si Korea
5. Department of Neurology; Seoul National University Bundang Hospital; Seongnam-si Korea