TGFB1 and hepatocellular carcinoma: Although short‐term TGF‐β treatment (24 hours) of SNU449 and HLF cells failed to enhance migratory abilities (Fig. 2A), long‐term TGF‐β treatment (> 10 days) revealed strong differences between the mesenchymal‐like HCC cell lines termed SNU449‐T and HLF‐T cells (Fig. 2B; Supporting Fig. S1).