. 2017 Jul 5;2017:8354640. doi: 10.1155/2017/8354640
Copyright © 2017 Nasim Salehi-Nik 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.
Search strategy flowchart.