. 2016 Oct 20;9:11.
© 2016 Medical Ethics and History of Medicine Research Center, Tehran University of Medical Sciences. All rights reserved.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License, (http://creativecommons.org/licenses/by/3.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 1.
The process of searching, retrieving, and selecting the documents