CD4 and primary biliary cholangitis: Compared with oeNC controls, the expression levels of IFN-γ and IL-17 was decreased in naive CD4+ T cells of oeXIST group in PBC patients (42.29 ± 3.03 vs 30.13 ± 2.13, p<0.01 and 130.61 ± 12.30 vs 87.00 ± 8.