1. Department of Intensive Care Unit, Hefei Boe Hospital Co., Ltd., Hefei, Anhui 230011, P.R. China
2. Department of Emergency, Central Theater General Hospital of The People's Liberation Army of China, Wuhan, Hubei 430070, P.R. China
3. Department of General Surgery, Hefei Boe Hospital Co., Ltd., Hefei, Anhui 230011, P.R. China