1. Department of Epidemiology and Biostatistics, First Affiliated Hospital, Army Medical University, Chongqing, China
2. Department of Anesthesiology, First People’s Hospital of Chengdu, Chengdu, China
3. The Fourth Department, State Key Laboratory of Trauma, Burns and Combined Injury, Institute for Traffic Medicine, Research Institute of Surgery, Daping Hospital, Army Medical University, Chongqing, China, and
4. The Eighth Department, State Key Laboratory of Trauma, Burns and Combined Injury, Research Institute of Surgery, Daping Hospital, Army Medical University, Chongqing, China