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. 2014 Jan 29;14:49. doi: 10.1186/1471-2407-14-49

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Copyright © 2014 Zhang et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 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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The forest plot of RRs was assessed for association between CXCR4 and clinicopathological features such as tumor category (a), N category (b), distant metastasis (c), ER status (d), PR status (e) and c-erbB-2 status (f).