The remaining genes, which include CKLF, CXCL10, CXCR1, CXCR2, CXCR6, IL12RB2, IFNG, TLR3 and ICAM-1, did not show any significant differential expression between the NK cells of RA patients and healthy controls (Figure 4C). The gene discussed is CXCR1; the disease is rheumatoid arthritis.