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. 2017 Jun 14;7:3471. doi: 10.1038/s41598-017-02992-7

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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 images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Comparison between neoadjuvant (n = 4984) and no-neoadjuvant groups (n = 4984) in the propensity score matched cohort. (A) Kaplan-Meier curves for cancer-specific survival. (B) HR of every clinical covariate from Cox model. (C) Sensitivity analysis estimating the effect of unmeasured confounders on hazard ratio. Red star means significantly render treatment effect (the lower confidence bound of CI is larger than 1).