1. Department of Hepatobiliary & Pancreatic & Spleen Surgery, Yantai Yuhuangding Hospital, The Affiliated Hospital of Qingdao University, Yantai, Shandong, China (mainland)
2. Department of Oncology, Yantai Yuhuangding Hospital, The Affiliated Hospital of Qingdao University, Yantai, Shandong, China (mainland)
3. Department of Oncology, Fushan District People’s Hospital, Yantai, Shandong, China (mainland)