1. Department of Emergency and Department of Intensive Care Unit, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
2. Chongqing Key Laboratory of Hepatobiliary Surgery and Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
3. Department of Anesthesia, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
4. Department of Endocrine and Breast Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China