Fig. 3.

CXCR3⁺ expression and Th phenotypes of peripheral T helper (TPh) and PD-1^high T follicular helper (TFh) cells in synovial fluid (SF) from patients with rheumatoid arthritis (RA). The proportions of TPh (a) and PD-1^highTFh (b) cells in RA SF that express CXCR3, and the proportions that express a Th1, CXCR3⁺Th2, Th1Th17 or CXCR3⁺Th17 phenotype as determined by the expression of chemokine receptors CCR6, CCR4 and CXCR3 (gating strategy shown in Supplementary Figure 2). Horizontal bars indicate the median