1. Department of Hepatobiliary Surgery, The Second Hospital of Jiaxing, Jiaxing, Zhejiang�314000, P.R.�China
2. Department of Gastroenterology, Changhai Hospital, Second Military Medical University, Shanghai�200000, P.R. China
3. Department of Hepatobiliary Surgery, The Second Hospital of Jiaxing, Jiaxing, Zhejiang 314000, P.R. China
4. Department of Central Laboratory, The Second Hospital of Jiaxing, Jiaxing, Zhejiang 314000, P.R.�China
5. Department of Gastroenterology, Changhai Hospital, Second Military Medical University, Shanghai 200000, P.R. China