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. 2020 Dec 10;10:21762. doi: 10.1038/s41598-020-78646-y

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© The Author(s) 2020

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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Mutations in the PI3K pathway are associated with poor overall survival for patients with HER2-positive (HER2+) and HER2 and ER double-positive (HER2+/ER+) breast cancer. (a) Overall survival (OS) was analyzed in patients with HER2+ breast cancer with (red) or without (blue) mutations in the PI3K pathway. Median OS was 115.3 (blue) vs 79.5 months (red), respectively (hazard ratio: 1.82; 95% CI 1.0–3.3, p value = 0.036). (b) OS was analyzed in patients with HER2+/ER+ breast cancer with (red) or without (blue) mutations in PI3K pathway. Median OS was 115.3 (blue) vs 79.0 months (red), respectively (hazard ratio: 2.10; 95% CI: 1.0–4.5, p value = 0.04).