1. Department of Hepatobiliary Surgery, Xiang'an Hospital of Xiamen University, Xiamen, Fujian 361102, P.R. China
2. School of Medicine, Xiamen University, Xiamen, Fujian 361102, P.R. China
3. Department of Medical Oncology, The First Affiliated Hospital of Xiamen University, Xiamen, Fujian 361003, P.R. China