4Paumgartner G, Beuers U. Mechanisms of action and therapeuticefficacy of ursodeoxycholic acid in cholestatic liver disease[JJ. Clin Liver Dis, 2004,8(1): 67-81.
5PAUMGARTNER G, BEUERS U. Mechanisms of action and therapeutic efficacy of ursodeoxycholic acid in cholestatic liver disease [ J ]. Clin Liver Dis, 2004, 8 ( 1 ) : 67-81.