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Effect of CPGS and RPGS on costimulatory factor CD28 of T-cell and T-cell subsets in peripheral blood. (a, b) Costimulatory factor CD28 in T-cells. (c, d) Costimulatory factor CD28 in Th cells. (e, f) Costimulatory factor CD28 in Tc cells. Values were represented as means ± SD (n = 8–10). ∗p < 0.05 and ∗∗p < 0.01.
