1. Department of Gastroenterology, the 307 Hospital of Academy of Military Medical Science, Beijing, China
2. Department of Internal Medicine, Clinic of August First Film Studio, Beijing, China
3. Liver Cirrhosis Diagnosis and Therapy Center, The 302 Military Hospital of PLA, Beijing, China
4. Department of Electronic Engineering, Information Science and Engineering School, Fudan University, Shanghai, China
5. Department of Gastroenterology, Changhai Hospital, the Second Military Medical University, Shanghai, China