1. Liver Research Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China
2. Beijing Key Laboratory of Translational Medicine on Liver Cirrhosis, Beijing, China
3. National Clinical Research Center for Digestive Diseases, Beijing, China
4. Clinical Epidemiology and EBM Unit, Beijing Friendship Hospital, Capital Medical University, Beijing, China
5. Liver Research Center, Beijing Friendship Hospital, Capital Medical University, 95 Yong-an Road, Beijing 100050, China