Fig. 2From: TNF-α inhibitor therapy can improve the immune imbalance of CD4+ T cells and negative regulatory cells but not CD8+ T cells in ankylosing spondylitisDifferences in CD4+ T cells and CD8+ T cells in the AS and HC groups at different stages of differentiation. P value summary: *P < 0.05, **P < 0.01, ***P < 0.001, ****P < 0.0001Back to article page