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. 2019 May 30;19:521. doi: 10.1186/s12885-019-5737-7

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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. 3 — Kaplan-Meier survival curves for the three clusters. (a and b) Overall survival (OS) (a) and relapse-free survival (RFS) (b) curves for all 51 pN0 breast cancers. Group 1 shows significantly worse OS than does group 2 (p = 0.014). c and d OS (c) and RFS (d) curves for 19 relapsed pN0 breast cancers. Group 1 shows significantly lower OS and RFS rates than group 2 (p = 0.0083 and 0.0018, respectively)