[1] Department of Neurosurgery, Sanggye Paik Hospital, Inje University College of Medicine, Dongil-ro 1342, Nowon-gu, 01757, Seoul
[2] Department of Anesthesiology, Sanggye Paik Hospital, Inje University College of Medicine, Dongil-ro 1342, Nowon-gu, 01757, Seoul