1 Department of Neurosurgery, School of Medicine, Chungnam National University Hospital, 282 Munhwa-ro, 35015, Jung-gu, Daejeon, Korea (Republic of).
2 Department of Neurosurgery, School of Medicine, Chungnam National University Hospital, 282 Munhwa-ro, 35015, Jung-gu, Daejeon, Korea (Republic of). [email protected].