Fig. 3

The frequency of cTfr cells, cTfh to cTfr ratio and the expression of ICOS, STAT3, STAT5 between BPR group and stable group. Squares refer to biopsy-proven rejection (BPR) group, cycles refer to stable renal function group; a cTfr: CXCR5⁺Foxp3⁺ on CD4⁺ cells; b cTfh to cTfr ratio; c CXCR5⁺ICOS⁺ on CD4⁺ cells; d ICOS⁺ on CXCR5⁺CD4⁺; e CXCR5⁺STAT3⁺ on CD4⁺ cells; f STAT3⁺ on CXCR5⁺CD4⁺ cells; g CXCR5⁺STAT5⁺ on CD4⁺ cells; h STAT5⁺ on CXCR5⁺CD4⁺ cells