Comparison of circulating EPCs and Tregs. The populations of circulating EPCs and Tregs were detected by flow cytometry at day 0, 1, 7, 14, 21, 28 after major hepatectomy and I/R injury. (A) The level of circulating EPCs was compared between YQ23 treatment and control groups. (B) The number of circulating Tregs was detected in YQ23 treatment and control groups. (**p < 0.01; N = 3/group).