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CD28 expression in ITP patients with TT or CT genotypes. (A) Representative plot of CD28 expression within the gate of CD4+ T cells. (B) CD28 expression at the protein level, and (C) mRNA level of ITP patients with the TT (n = 11 and n = 5, respectively) or CT genotypes (n = 11 and n = 5, respectively). **p < 0.01; *p < 0.05.
