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Amar S, Moreno-Aspitia A, Perez EA.Amar S, et al. Among authors: perez ea.Breast Cancer Res Treat. 2008 May;109(1):1-7. doi: 10.1007/s10549-007-9636-2. Epub 2007 Jul 26.Breast Cancer Res Treat. 2008.PMID: 17653858Review.