1. Department of Hepatobiliary and Pancreatic Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China (mainland)
2. Shandong Key Laboratory of Digital Medicine and Computer Assisted Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China (mainland)
3. Department of Oncological Medical Services, Institute of Health Sciences, Tokushima University of Graduate School, Tokushima City, Tokushima, Japan
4. Department of Surgery, Institute of Biomedical Sciences, Tokushima University of Graduate School, Tokushima City, Tokushima, Japan