EGFR and neoplasm: One reason for the difference between this study and other reports may be that EGFR protein levels were measured in individual cells rather than copy number analysis or transcript levels in bulk tumor samples; our own analyses and others’ have indicated that copy number or transcript level are not necessarily predictive of protein expression (Baser et al., 2019; Brennan et al., 2009; Chakravarty et al., 2017).