1. Tongji Shanxi Hospital, Third Hospital of Shanxi Medical University, Shanxi Academy of Medical Sciences, Shanxi Bethune Hospital, Department of Anesthesiology, Taiyuan, People's Republic of China.
2. Huazhong University of Science and Technology, Tongji Hospital, Tongji Medical College, Wuhan, People's Republic of China.
3. Xuzhou Medical University, The Affiliated Hospital of Xuzhou, Department of Critical Care Medicine, Xuzhou, People's Republic of China.