CXCL16 and rheumatoid arthritis: The expression of the CXCL16 mRNA positively correlated with miR-451 expression (r = 0.497; p = 0.030, Fig. 3B) in RA-risk individuals with arthralgia, but a correlation was not observed in HC (r = 0.182; p = 0.456) (Fig. 3C).