MUC1 and rheumatoid arthritis: We found that hsa-miR-214-5p and hsa-miR-7-5p were increased in the ILD(+)RA group (Fig. 1a and b), though the superiority of these miRNA profiles was not observed compared with KL-6 (AUC = 0.86, cut-off level = 331.5, sensitivity =0.769, and specificity =0.842) [7].