CD8A and rheumatoid arthritis: Further investigation revealed that 14 types of cells, including Myocytes, Tgd_cells, Monocytes, Skeletal_muscle, Adipocytes, CD8+_naive_T-cells, Endothelial_cells, aDC, CD8+_Tem, CD4+_Tcm, Macrophages, MSC, Macrophages_M1 and Th2_cells, were all different in AS and RA.