1. Department of Neurosurgery, Seoul National University College of Medicine, Seoul, Republic of Korea;
2. Neuro-Oncology Clinic Center for Specific Organs Center National Cancer Center, Goyang, Republic of Korea;
3. Biometric Research Branch National Cancer Center, Goyang, Republic of Korea;
4. Department of Biomedical Engineering, National Cancer Center, Goyang, Republic of Korea;
5. Department of Neurosurgery, Eulji Medical Center Eulji University, Daejeon, Republic of Korea