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Changes in the expression of CD28, CD69, and CD25 antigens on CD4+ T lymphocytes in vitro. Graphs show the expression of CD28, CD69, and CD25 antigens on CD4+ T lymphocytes after 72 h (a, c, e) and 120 h (b, d, f) of stimulation with anti-CD3 antibody in all examined groups. Midpoints of figures present medians, boxes present 25–75%, and whiskers outside present the minimum and maximum of all the data, *p < 0.05, Kruskal–Wallis test. MFI mean fluorescence intensity
