To discover the mechanism of action of CDKN2B-AS1 in pulmonary fibrosis, we analyzed the relationship between CDNK2B and miRNA by using the bioinformatics website ‘StarBase’ and found that a binding site between CDNK2B and miR-199a-5p exists (Figure 4a), which means that miR-199a is the target of CDNK2B. Here, CDKN2B is linked to pulmonary fibrosis.