1. Department of Gastrointestinal Surgery, Zhongshan Hospital of Xiamen University, Xiamen, Fujian, China
2. Institute of Gastrointestinal Oncology, Medical College of Xiamen University, Xiamen, Fujian, China
3. Department of General Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
4. Department of General Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, China
5. Department of Radiation Oncology, Cancer Institute of New Jersey, Rutgers University, New Brunswick, New Jersey, USA
6. Department of Medical Imaging and Ultrasound, Zhongshan Hospital of Xiamen University, Xiamen, Fujian, China