1. Department of Hepatobiliary Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
2. Division of Gastroenterology and Hepatology, Department of Medicine, Liver Disease Prevention Center, Thomas Jefferson University, Philadelphia, PA 19107, USA
3. Division of Population Science, Department of Medical Oncology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA 19107, USA
4. State Key Laboratory of Cancer Biology and Experimental Teaching Center of Basic Medicine, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
5. Institute of Pharmacy, Pharmaceutical College of Henan University, Kaifeng, Henan 475004, P.R. China