CD8A and rheumatoid arthritis: In the case of DN T cells (Supplementary Figure 7), TCRγ/δ+ T cells, CD8a+ NKT cells (Supplementary Figure 8), NK cells (Supplementary Figure 9), and monocytes (Supplementary Figure 11), all three patient groups had significantly higher CD38 expression compared with HCs (in the case of NK cells, there was no significant difference between RA vs. HCs, p = 0.0681).