HMGA2 and hepatocellular carcinoma: Liver cancer cells transfected with the miR‐9 inhibitor exhibited an increase in proliferation, S‐phase cell fraction, cell migration and invasion capacity of HCC cells, whereas down‐regulation of miR‐9 expression and interference with HMGA2 exhibited an inhibition in proliferation, S‐phase cell fraction and migration capacity of HCC cells (Fig. 5A–E).