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. 2017 Oct 16;7:13206. doi: 10.1038/s41598-017-13448-3

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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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Examples of Kaplan-Meier estimates for (a) loco-regional tumour control and (b) overall survival for patients of the validation cohort stratified into a low and a high risk group by the cut-off determined on the exploratory cohort. The Aerts et al.⁵ signature in combination with the BT-Cox and the BGLM-Weibull model showed a significant patient stratification as well as a high performance (C-Index: 0.65 and C-Index: 0.63, respectively).