. 2015 Nov 8;2015:762546. doi: 10.1155/2015/762546
Copyright © 2015 Raphael Hernando Parrado et al.
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 1.
Systemic research and article selection.