1. Department of Hepatobiliary Surgery, Hunan Provincial People's Hospital, Changsha, Hunan 410002, P.R. China
2. Department of Hepatobiliary Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
3. Department of Rheumatology and Immunology, Hunan Provincial People's Hospital, Changsha, Hunan 410002, P.R. China