1 Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, People's Republic of China. tanx206@163.com.
2 Department of Liver Transplantation, The Second Xiangya Hospital of Central South University, Changsha, Hunan Province, 410011, People's Republic of China.
3 Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, People's Republic of China.
4 Department of General Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan Province, 410011, People's Republic of China.
5 Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15213, USA. tongjingshan@gmail.com.