1. Graduate School Department, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
2. Department of Intensive Care Unit, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
3. Intensive Care Unit, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong 510630, P.R. China
4. Intensive Care Unit, General Hospital of Guangzhou Military Command, Key Laboratory of Tropical Zone Trauma Care and Tissue Repair of PLA, Guangzhou, Guangdong 510010, P.R. China
5. Emergency Department, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510405, P.R. China