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. 2020 Mar 4;15:88. doi: 10.1186/s13018-020-01607-8

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© The Author(s) 2020

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. 9 — External validation calibration plot for nomograms. a–f The graphs show the calibration plots for external validation of a 1-year, b 3-year, and c 5-year overall survival. d 1-year, e 3-year, and f 5-year cancer-specific survival