1. Department of Emergency Surgery, The Affiliated Hospital of Qingdao University, Qingdao, P.R. China.
2. Department of General Surgery, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, P.R. China.
3. Lab for Trauma and Surgical Infections, Department of Surgery, Jinling Hospital, Affiliated to Southeast University, Nanjing, P.R. China.