1. Department of Radiation Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
2. Department of Colorectal Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
3. Department of Pathology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
4. Department of Radiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
5. Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, China.