CD4 and autoimmune hepatitis: As expected, the percentage of and total number of CD4+ T cells in the liver of the UC-MSC-treated group were decreased to a greater extent compared with those in the AIH model group (3.533 ± 0.988 vs. 14.400 ± 6.923, P < 0.05) (Figures 3(a) and 3(b)).