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. 2014 Jun 6;14:407. doi: 10.1186/1471-2407-14-407

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Copyright © 2014 Boudot 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 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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Box plots of CXCR4, CXCR7, CXCL12, and COUP-TFI mRNA expression in breast cancer and normal tissue. CXCR4 (A), CXCR7 (B), CXCL12 (C), and COUP-TFI (D) mRNA expression was measured by real-time PCR in 23 normal breast tissue samples (NT), in 20 SBR grades 1 and 2, and in 19 SBR grades 3. The expression level was normalized by 18S RNA expression and analyzed with IQ5 software (Bio-Rad). The data are presented as whisker plots in which the horizontal bar represents the median, the grey boxes are the 25^th and 75^th percentiles, the vertical bar is the standard deviation, and the plus signs are the extreme points. All the Mann-Whitney tests were performed with Minitab 16 software, and the p value is indicated on the different graphs (ns denotes non-significant).