1. Department of Medical Oncology, The First Affiliated Hospital of Xiamen University, Siming District, Xiamen City, Fujian Province, China
2. Department of General Surgery, The First Affiliated Hospital of Xiamen University, Siming District, Xiamen City, Fujian Province, China
3. Department of Gastrointestinal Surgery, The First Affiliated Hospital of Xiamen University, Siming District, Xiamen City, Fujian Province, China