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. 2014 Sep 20;16:439. doi: 10.1186/s13058-014-0439-1

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© Eng et al.; licensee BioMed Central Ltd. 2014

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Distribution of control participants by BI-RADS categories and percent density (PD) values yielded by each quantitative method. *Density readings taken on the left cranio-caudal view (CC) except for BI-RADS, for which the four breasts/views were used to provide a single score per woman, and Quantra, which aggregated data from the CC and medio-lateral oblique view to provide a single measurement per breast.