CD4 and autoimmune thrombocytopenic purpura: A recent study in newly diagnosed adult ITP patients (n = 55), who did not receive treatment in at least 3 months prior to enrollment, demonstrated that in the GC-sensitive group the levels of CD8+ CD25str+ Tregs were significantly higher than in the GC-insensitive group, while no obvious changes were observed for CD4+ Tregs [57].