1. Division of Gastroenterology, Tongji Hospital, Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan China
2. Department of Radiology, Tongji Hospital, Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan China
3. Department of Infectious DiseasesThe Second Affiliated Hospital of Chongqing Medical UniversityChongqing China