DepartmentofGastroenterology;
PekingUniversityFirstHospital;
Beijing;
China//DepartmentofMedicine;
FacultyofMedicine;
UniversityofHongKong;
HongKong;
China//ContributedEquallytoThisWork;
DepartmentofMedicine;
FacultyofMedicine;
UniversityofHongKong;
HongKong;
China;
DepartmentofMedicine;
FacultyofMedicine;
UniversityofHongKong;
HongKong;
China//contributedEquallytoThisWord;