1. Interdepartment of Critical Care Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
2. Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
3. Department of Pharmacy, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
4. Department of Neurosurgery, School of Medicine, Kyung Hee University Medical Center, Seoul, Republic of Korea.
5. Department of Neurology, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
6. Department of Neurosurgery, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.