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https://open.clemson.edu/all_dissertations/2010/ "Triple Negative Breast Cancer: Incidence Rates; Phenotype, Demographic" by Annamalar P. Jeyasehar A breast tumor with a histology report that lacks Estrogen Receptor, Progesterone Receptor, and Human Epidermal Growth Receptor 2/neu is identified as a Triple... triple negative breast cancerincidence rates