1. Department of Hepato-Biliary-Pancreato-Vascular Surgery, The First Affiliated Hospital of Xiamen University, Xiamen, Fujian, China
2. Department of Gastrointestinal Surgery, Cancer Hospital, The First Affiliated Hospital of Xiamen University, Teaching Hospital of Fujian Medical University, Xiamen, China
3. Department of Gastrointestinal Surgery, Xiamen Cancer Hospital, The First Affiliated Hospital of Xiamen University, Xiamen, Fujian 361003, China
4. Department of Medical Oncology, Cancer Hospital, The First Affiliated Hospital of Xiamen University, Teaching Hospital of Fujian Medical University, Xiamen, China