DivisionofSurgicalOncologyandDivisionofGastrointestinalSurgery;
PekingUniversityPeople'sHospital;
Beijing100044;
China;
DivisionofPathology;
PekingUniversityPeople'sHospital;
Beijing100044;
China;
DivisionofSurgicalOncologyandDivisionofGastrointestinalSurgery;
PekingUniversityPeople'sHospital;
Beijing100044;
China;