Fig. 5From: Enhanced IL-6/phosphorylated STAT3 signaling is related to the imbalance of circulating T follicular helper/T follicular regulatory cells in patients with rheumatoid arthritisCorrelation between phosphorylated STAT3 (pSTAT3) expression and circulating follicular helper T (Tfh) cell frequency. The expression of pSTAT3 in CD4+CXCR5+ Tfh cells was positively correlated with the frequency of circulating Tfh cells (r = 0.477, P = 0.001)Back to article page