1. From the Department of Neurology (K.H.K., S.-H.K., J.-W.H., H.J.K.), Department of Neurosurgery/Neuro-oncology Clinic (M.P., H.-S.G., Y.-S.D., S.-H.S., H.Y., K.C.W.), Biostatistics Collaboration Team (E.Y.P.), Department of Cancer Control (H.-S.G.), Graduate School of Cancer Science and Policy, and Department of Radiology (J.W.S.), Research Institute and Hospital of National Cancer Center, Goyang, South Korea.