. 2016 May 5;16(1):63–73. doi: 10.1177/1534735416645180
© The Author(s) 2016
This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 3.0 License (http://www.creativecommons.org/licenses/by-nc/3.0/) 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).
Figure 2.
Overall risk of bias assessment using the Cochrane tool.