CFTR and rheumatoid arthritis: No aberrant expression of CFTR was identified in the current microarray analysis, and our subjects did not have a high rate of RA with diffuse bronchiectasis (DB), which indicates that the function of ENST00000456270 may not be related to CFTR; however, ENST00000456270 may be a biomarker for the diagnosis of RA and may play an important role in the pathogenesis of RA, which requires further research to validate.