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. 2019 Oct 15;19:952. doi: 10.1186/s12885-019-6193-0

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© The Author(s). 2019

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. 2 — Overall survival graph by Kaplan–Meier survival method, classified by (a) AJCC 8th edition N stage, (b) LNR (LNR 1, LNR = 0; LNR 2, LNR > 0 to ≤0.2; LNR 3, LNR > 0.2 to ≤0.4; LNR 4, LNR > 0.4), and (c) LODDS (LODDS 1, quantile 1; LODDS 2, quantile 2; LODDS 3, quantile 3; LODDS 4, quantile 4). AJCC, American Joint Committee on Cancer; LNR, Lymph-node ratio; LODDS, log odds of metastatic lymph nodes