InstituteofDigestiveMedicine,NanfangHospital,FirstMilitaryMedicalUniversity,Guangzhou510515,GuangdongProvince,China;
DepartmentofPathology,NanfangHospital,FirstMilitaryMedicalUniversity,Guangzhou510515,GuangdongProvince,China;
CenterDepartmentofChineseAcademyofEngineeringandPhysics,Mianyang621000,SichuanProvince,China;