. 2014 Feb 12;2014:819871. doi: 10.1155/2014/819871
Copyright © 2014 Joanne W. Y. Chung 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 3.
Results of risk of bias analysis.