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This letter to the editor refers to the article available at doi:10.1007/s10549-017-4302-9 and a rebuttal letter to this letter to the editor is available at doi:10.1007/s10549-017-4471-6.
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Narod, S.A. Reply to Kopans. Breast Cancer Res Treat 166, 653–654 (2017). https://doi.org/10.1007/s10549-017-4465-4
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DOI: https://doi.org/10.1007/s10549-017-4465-4