. 2012 Dec 18;11:152. doi: 10.1186/1475-2840-11-152
Copyright © 2012 Hernestal-Boman 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.
Schematic figure of study population.