. 2015 May 29;4:118. doi: 10.4103/2277-9175.157849
Copyright: © 2015 Khayyatzadeh.
This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Figure 1.
Study design flowchart