In another study, researchers measured the miRNAs in NK cells and CD8+ T cells of CFS patients, and found that the expression levels of miR-21 in NK cells and CD8+ T cells, and miR-17-5p, miR-10a, miR-103, miR-152, miR-146a, miR-106, miR-223 and mi R-191 in NK cells were significantly lower than those in the normal control group. The gene discussed is CD8A; the disease is myalgic encephalomeyelitis/chronic fatigue syndrome.