1. Department of Hepatobiliary Surgery, Second Hospital of Hebei Medical University, Shijiazhuang, China.
2. Department of Radiology, Second Hospital of Hebei Medical University, Shijiazhuang, China.
3. Department of General Surgery, Dagang Hospital, Binhai New Area, Tianjin, China.
4. Department of General Surgery, Lincheng County People's Hospital, Xingtai, China.
5. Hepatobiliary Surgery Department, First Hospital of Hebei Medical University, Shijiazhuang, China.