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. 2018 Sep 17;6:e5665. doi: 10.7717/peerj.5665

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©2018 Ma et al.

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.

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(A–B) The differences in Kaplan–Meier survival curves for (A) different surgery groups and (B) different MYCN status showed statistical significance (P = .009 and P < .001 by log-rank test, respectively) in the 169 stage 3 and 4 patients.