CCL4 and Hepatic fibrosis: Roy et  al found that the expression level of miR‐193a‐3p was decreased not only in the liver tissues of patients with liver cirrhosis but also in CCL4‐induced liver fibrosis in mice.17 In addition, a previous study showed that the level of miR‐193b was down‐regulated in human liver fibrosis samples, as compared with normal liver samples.18 So miR‐193 family may participate in the regulation of liver fibrosis, whereas its potential mechanisms are unclear and worthy of further investigation.