1. Shengli Clinical Medical College of Fujian Medical University, Fuzhou, Fujian, China.
2. Department of Hepatobiliary Pancreatic Surgery, Fujian Provincial Hospital, Fuzhou, Fujian, China.
3. Department of Hepatobiliary Pancreatic Surgery, Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China.
4. Department of General Surgery, Fujian Provincial Hospital, Fuzhou, Fujian, China.