Objective:To study the effects of Buyi prescription combined with immunotherapy on PD-1/PD-L1 expression in peripheral blood T cells in patients with autoimmune hepatitis.Methods:A total of 56 patients with autoimmune hepatitis who were treated in our hospital between May 2014 and December 2016 were randomly divided into two groups of 28 patients in each group.The control group received prednisone combined with azathioprine for routine immunotherapy,and the observation group received Buyi prescription combi...