1. Department of Breast, Thyroid, Pancreatic Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
2. Graduate School, Chongqing Medical University, Chongqing 400010, P.R. China
3. Department of Radiological Medicine and Oncology, College of Basic Medicine, Chongqing Medical University, Chongqing 400016, P.R. China
4. Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China