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Correlation between disease activities of RA and miRNAs in plasma or synovial fluid. TJC correlated with plasma miRNAs (A) or SF/PB ratio of miRNA (B). DAS28 correlated with plasma miRNAs (C), but not with synovial fluid miRNAs (D). r values of Pearson's product-moment correlation and P-values of their null hypothesis are shown. Regression lines are shown when P values are less than 0.1.