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. 2018 Oct 22;18:1012. doi: 10.1186/s12885-018-4911-7

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© The Author(s). 2018

Open Access This 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. 2 — Cumulative incidence of brain metastasis progression using competing risks regression analysis in patients treated with gefitinib or erlotinib. a All patients in this study. b Patients who had brain metastasis before EGFR-TKI administration. c Patients who had no brain metastasis before EGFR-TKI administration