. 2013 Apr 22;2013:325464. doi: 10.1155/2013/325464
Copyright © 2013 Kjersti Karoline Danielsen 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 2.
Flow of participants throughout the study.