Fudan University - Department of Colorectal Surgery, Fudan University - Department of Colorectal Surgery, Fudan University - Department of Pathology, Fudan University - Department of Colorectal Surgery, Fudan University - Department of Colorectal Surgery, Fudan University, Fudan University, Fudan University, Fudan University, Fudan University - Department of Colorectal Surgery, Fudan University, Fudan University - Department of Radiation Oncology, Fudan University - Department of Colorectal Surgery, Fudan University, Fudan University, Fudan University - Department of Radiation Oncology, Fudan University - Department of Colorectal Surgery, Fudan University - Shanghai Cancer Center (FUSCC) and Zhengzhou University - Department of Pathology