1. Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China.
2. Department of Critical Care Medicine, XiaoLan Hospital of Southern Medical University, Zhongshan, Guangdong, P.R. China.
3. Department of Clinical Laboratory, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China.
4. Guangdong Provincial Key Laboratory of Shock and Microcirculation Research, Department of Pathophysiology, Southern Medical University, Guangzhou, P.R. China.