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. 2018 Apr 2;18:50. doi: 10.1186/s12935-018-0548-5

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© The Author(s) 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. 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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Fig. 4 — Integrin β4 was negatively correlated with p-EGFR activation (n = 50). a p-EGFR and integrin β4 protein expressions were determined by western blot. b Pearson correlation coefficients between p-EGFR and integrin β4. 1–4, gefitinib-sensitive gastric cancer samples; 5–7, gefitinib-resistant gastric cancer samples. *P < 0.05 vs. gefitinib-sensitive gastric cancer samples