CD8A and rheumatoid arthritis: The promoted local recruitments of five types of immune cells in RA tissues were inferred by CIBER-SORT, among which increased proportions of CD8(+) T cells and M1 inflammatory macrophages were consistent with the verification regarding 2 out of 3 top upregulated genes (elevated TREML2 and FUT7 corresponded to increased proportions of CD8(+) T cells and M1 inflammatory macrophages, respectively) in RA tissue samples.