. 2012 Mar 25;2012:593569. doi: 10.1155/2012/593569
Copyright © 2012 Yinglin Xia 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.
Distribution of outcome variables at 12 months.