1. Department of Gastrointestinal Surgery, Zhongshan Hospital of Xiamen University, Xiamen, Fujian 361004, P.R. China
2. Department of Basic Medicine, Medical College of Xiamen University, Xiamen, Fujian 361000, P.R. China
3. Department of Cancer Prevention and Rehabilitation, Huayan Science and Technology Cancer Prevention and Rehabilitation Research Center, School of Pharmaceutical Sciences Xiamen University, Xiamen, Fujian 361102, P.R. China
4. School of Clinical Medicine, Fujian Medical University, Fuzhou, Fujian 350000, P.R. China