. 2017 Feb 1;8(3):2054270416681747. doi: 10.1177/2054270416681747
© The Author(s) 2017
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 1.
Search process with inclusion and exclusion criteria.