EGFR and cancer: Epidermal growth factor receptors (EGFRs), fibroblast growth factor receptors (FGFRs) and ErbB tyrosine kinase receptor (ErbB) families are involved in growth control and differentiation of cancer stem cells (Flageng et al. 2013; Nguyen et al. 2013; Reed et al. 2012; Liu et al. 2009).