1. Department of Spine Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, People’s Republic of China
2. Department of Anesthesiology, China-Japan Union Hospital of Jilin University, Changchun 130033, People’s Republic of China
3. Department of Operating Room, China-Japan Union Hospital of Jilin University, Changchun 130033, People’s Republic of China