1. Department of Gastrointestinal Surgery, Zhongshan Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361004, China
2. Xiamen Municipal Key Laboratory of Gastrointestinal Oncology, Xiamen 361004, China
3. Institute of Gastrointestinal Oncology, Medical College of Xiamen University, No. 201-209, Hubin South Road, Xiamen 361004, China
4. The Graduate School, Fujian Medical University, Fuzhou 350004, China