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. 2017 Nov 6;17:713. doi: 10.1186/s12885-017-3702-x

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© The Author(s). 2017

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 — ROC curve for LNR for MET-PET diagnosis. The LNR cut-off value of 1.40 (dot) provided the best specificity and sensitivity for differentiating between LR and LN, 0.75 and 0.82, respectively. The highest area under the ROC curve was 0.84 (95% CI: 0.71–0.97)