. 2014 Feb 3;14:28. doi: 10.1186/1471-244X-14-28
Copyright © 2014 Jørgensen et al.; licensee BioMed Central Ltd.
This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 3.
Flowchart for recruitment.