Re-Appraisal of Estrogen Receptor Negative/Progesterone Receptor Positive (ER-/PR+) Breast Cancer Phenotype: True Subtype or Technical Artefact? - Foley NM; Coll JM; Lowery AJ; Hynes SO; Kerin MJ; Sheehan M; Brodie C; Sweeney KJ (Pathology oncology research : POR, 2018)