CCR6 and autoimmune thrombocytopenic purpura: By contrast, CCR4 on CD4+IL-4+ and CD4+IL-17+ T cells, CCR6 on CD4+IL-17+ T cells, CCR10 on CD4+IL-22+ T cells, and CXCR4 on CD4+FoxP3+ T cells in BM or PB showed no statistical difference between ITP patients and HCs (all P > 0.05).