1. Department of Gastroenterology, Binzhou Medical University Hospital, Binzhou, Shandong Province, China
2. Department of Radiology, Binzhou Medical University Hospital, Binzhou, Shandong Province, China
3. Department of Pathology, Binzhou Medical University Hospital, Binzhou, Shandong Province, China
4. Department of Haematology, Binzhou Medical University Hospital, Binzhou, Shandong Province, China
5. Department of Hepatobiliary Surgery, Binzhou Medical University Hospital, Binzhou, Shandong Province, China
6. Endoscopy Centre, Binzhou Medical University Hospital, Binzhou, Shandong Province, China