Capital Medical University - Clinical Epidemiology and EBM Unit, Capital Medical University - Department of General Surgery, Capital Medical University - Clinical Epidemiology and EBM Unit, Capital Medical University - Liver Research Center, affiliation not provided to SSRN, Capital Medical University - Liver Research Center, Beijing Center for Diseases Prevention and Control, Statistics Center, Capital Medical University - Liver Research Center, Capital Medical University - Experimental Center, Government of the People's Republic of China - National Health Commission (formerly National Health and Family Planning Commission), Beijing Center for Diseases Prevention and Control, Statistics Center and Capital Medical University - Liver Research Center