1. Department of Neurosurgery, Dong-A University Hospital, Dong-A University College of Medicine, Busan, Republic of Korea;
2. Novalis Radiosurgery Center, Dong-A University Hospital, Dong-A University College of Medicine, Busan, Republic of Korea;
3. Department of Radiology, Dong-A University Hospital, Dong-A University College of Medicine, Busan, Republic of Korea