CD8A and juvenile idiopathic arthritis: Analysis of IL‐17A+CD8+ T cells and IL‐17A+CD4−CD8− T cells (of which ~80% were γδ T cells; data not shown) established that there was also a significantly higher percentage of IL‐17A+CD8+ T cells and a trend toward an increase in IL‐17A+CD4−CD8− T cells in JIA SFMCs compared to healthy control adult PBMCs and JIA PBMCs (Figures 3B and C).