1. Department of Hepatobiliary Surgery, The First Affiliated Hospital of Hunan Normal University, Hunan Provincial People’s Hospital , Changsha, Hunan, P. R. China
2. Central Laboratory of Hunan Provincial People’s Hospital (The First Affiliated Hospital of Hunan Normal University) , Changsha, Hunan, P. R. China
3. Hunan Provincial Key Laboratory of Biliary Disease Prevention and Treatment , Changsha, Hunan, P. R. China