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Flow cytometric analyses of peripheral blood Tregs in RA patients and healthy controls. CD4 positive cells were gated from lymphocyte population (A). Intracellular FoxP3 and the expression of surface CD25 were indicated as dot plots (Q2) for healthy controls (B) and RA patients (C). Data are shown as mean and SD in scatter plot, representing significant difference of Treg (%) between healthy controls and RA patients (D)
