. 2014 Jun 26;12:107. doi: 10.1186/1741-7015-12-107
Copyright © 2014 de Hoog 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/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 1.
Flow chart of the study population.