TGFB1 and cancer: The synergistic effect between TGF‐β and EGFR on promoting cancer progression has also been confirmed in several cancer types (Buonato et al., 2015; Kang et al., 2012; Richter et al., 2011; Uttamsingh et al., 2008; Wendt et al., 2010; Xu et al., 2010).