1. Liver Cirrhosis Study GroupDepartment of GastroenterologyGeneral Hospital of Shenyang Military AreaShenyangChina
2. Postgraduate CollegeShenyang Pharmaceutical UniversityShenyangChina
3. Division of GastroenterologyVancouver General HospitalVancouverCanada
4. Liver Research UnitMedica Sur Clinic & FoundationMexico CityMexico