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. 2015 May 21;10:115. doi: 10.1186/s13014-015-0419-3

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© Hall et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. 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. 1 — Overall survival (OS) by dose group. The Kaplan-Meier curves showed a clear and statistically significant association between higher radiotherapy dose and improved OS (p < 0.0001)