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. 2020 Dec 3;16(1):77–84. doi: 10.1007/s11523-020-00781-3

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© The Author(s) 2020

Open AccessThis article is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License, which permits any non-commercial 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-nc/4.0/.

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Fig. 1 — Kaplan–Meier curves for progression-free survival (a, c) and overall survival (b, d) according to the allele frequency of EGFR-activating mutations or the T790M mutation, and progression-free survival (e) and overall survival (f) according to the EGFR T790M/activating mutation ratio in plasma circulating tumor DNA before starting second-line osimertinib therapy. EGFR epidermal growth factor receptor