Pinhel, Isabel; Hills, Margaret; Drury, Suzanne; Salter, Janine; Sumo, Georges; A'Hern, Roger; Bliss, Judith M; Sestak, Ivana; Cuzick, Jack; Barrett-Lee, Peter; +3 more... Harris, Adrian; Dowsett, Mitch; NCRI Adjuvant Breast Cancer Trial Management Group; (2012) ER and HER2 expression are positively correlated in HER2 non-overexpressing breast cancer. Breast cancer research : BCR, 14 (2). R46-. ISSN 1465-5411 DOI: https://doi.org/10.1186/bcr3145