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. 2018 May 30;9(2):191–201. doi: 10.1177/2192568217741114

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© The Author(s) 2018

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 License (http://www.creativecommons.org/licenses/by-nc-nd/4.0/) which permits non-commercial use, reproduction and distribution of the work as published without adaptation or alteration, without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 1. — CONSORT diagram detailing inclusion and exclusion criteria. Fifty-seven articles were included in the analysis, with a total of 1235 surgical sacral chordoma patients.