Figure 2. High frequency of TFH cells in the peripheral blood of IA patients.

(A) The percentages of CXCR5⁺CD4⁺ in the total CD4⁺ T cells. (B) The percentages of ICOS⁺CXCR5⁺CD4⁺ in total CXCR5⁺CD4⁺ cells. (C) The percentage of PD-1⁺CXCR5⁺CD4⁺ in total CXCR5⁺CD4⁺ cells. (D) The percentage of ICOS⁺PD-1⁺CXCR5⁺CD4⁺ in total CXCR5⁺CD4⁺ cells. Data are expressed as mean % of individual samples from at least two separate experiments. The horizontal lines show the median.