. 2012 Dec 6;13:242. doi: 10.1186/1471-2474-13-242
Copyright © 2012 Poulsen 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 1.
Flow chart of participants included in the study.