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Immunohistochemisty of EGFR and pEGFR in invasive breast carcinoma. Intense membrane staining of (a) EGFR (ABC/HRPX200) and of (b) pEGFR (ABC/HRPX400) in two cases of invasive ductal breast carcinoma. EGFR, epidermal growth factor receptor; pEGFR, phosphorylated epidermal growth factor receptor.
