We also found that TGF‐β1 has a positive correlation with HIF‐1α as well as Snail and β‐catenin in PQ poisoning‐induced pulmonary fibrosis, the latter of which are the two other EMT‐promoting cytokines in addition to TGF‐β1 26. Here, TGFB1 is linked to pulmonary fibrosis.