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. 2019 Feb 24;10(1):89–101. doi: 10.1177/2192568218823695

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© The Author(s) 2019

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 License (https://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 4. — PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) flowchart.²³ A total of 504 original articles were retrieved. A total of 114 articles were used in the final review with quantitative data retrieved from 42 of these articles.