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. 2017 Aug 25;10(9):701–713. doi: 10.1177/1756283X17725977

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© The Author(s), 2017

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

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Figure 1. — Flow diagram of literature search.

^aThe studies by Hashimoto and colleagues²² and Noto and colleagues²⁴ had sex-based data.