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. 2021 Jan 13;11:1199. doi: 10.1038/s41598-020-79801-1

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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The correlation between the HIF-1α level before receiving treatment and the time of EGFR-TKIs acquired resistance occurring for 103 cases receiving EGFR-TKIs treatment. Linear correlation analysis was adopted to evaluate the correlation between the HIF-1α level before receiving treatment and the time of EGFR-TKIs acquired resistance occurring, and the result showed the negative correlation (R = − 0.938, P = 0.000).