1. Dalian Medical University, Dalian, Liaoning 116044, P.R. China
2. Department of Hepatobiliary Surgery, Clinical Medical College of Yangzhou University, Yangzhou, Jiangsu 225000, P.R. China
3. Department of Hepatobiliary Surgery, Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
4. Medical College of Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
5. Institute of Hematology, Clinical Medical College of Yangzhou University, Yangzhou, Jiangsu 225000, P.R. China