Fig. 2. Frequencies of CD4⁺CD25^hiCD127^low/- Tregs in peripheral blood of RA patients with different therapies. Frequencies of Tregs were compared according to whether RA patients were on treatment (a), such as DMARDs (b), Steroids (c) or TNF-α inhibitors (d) (p>0.05). The p value was measured with Mann-Whitney test. n.s., not significant.