1. Department of Pathology, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
2. Department of Oncology, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
3. Department of Radiation Oncology, Jiangsu Cancer Hospital, Nanjing, Jiangsu, China
4. Department of Gastroenterology, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China