PTEN and Hepatic fibrosis: The miR‐20a‐5p level was markedly downregulated in hepatic stellate cells after TGF‐β1 treatment or liver fibrosis samples, and elevation of miR‐20a‐5p reduced liver fibrosis by directly targeting TGFBR259, 60 or phosphatase and tensin homologue (PTEN).61