. 2012 Feb 29;2012:290231. doi: 10.1155/2012/290231
Copyright © 2012 Gunvor S. Fosnes 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.
A flow chart of the participants in the study.