1. Xiangya HospitalDepartment of PathologyCancer Research InstituteCentral South University Changsha Hunan 410008 China
2. Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of EducationCentral South University Changsha 410078 China
3. NHC Key Laboratory of CarcinogenesisCentral South University Changsha 410078 China
4. Hunan Key Laboratory of Nonresolving Inflammation and CancerDepartment of GastroenterologyThe Third Xiangya HospitalCentral South University Changsha 410013 China
5. Department of Anorectal SurgeryThe First Affiliated Hospital of Zhengzhou University Zhengzhou Henan 450052 China
6. Department of PathologyThe Second Xiangya HospitalCentral South University Changsha 410011 China