ERBB2 and breast cancer: Eleven studies specified the stage of the diagnose of the breast cancer, being eight with individuals diagnosed with HER2-positive eBC (Burcombe et al., 2013; North et al., 2015; De Cock et al., 2016; Farolfi et al., 2017; Lopez-Vivanco et al., 2017; Mitchell and Morrissey, 2019; Rojas et al., 2020; O’Shaughnessy et al., 2021) and three HER2-positive early or metastatic BC (Olofsson et al., 2016; Tjalma et al., 2018; Kashiura et al., 2019).