. 2013 Oct 2;21:34. doi: 10.1186/2045-709X-21-34
Copyright © 2013 Scholten-Peeters et al.; licensee BioMed Central Ltd.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 1.
Flowchart of the inclusion and exclusion of RCTs.