1. Department of Hepatobiliary and Pancreatic Surgery, The Affiliated Hospital of Qingdao University, Qingdao, China
2. Department of Vascular Surgery, The Affiliated Hospital of Qingdao University, Qingdao, China
3. Medical Imaging Department, Shandong Cancer Hospital and Institute, Jinan, Shandong, China
4. Department of Hepatobiliary and Pancreatic Surgery, HuiKang Hospital of Qingdao, Shandong, China
5. Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, China.