. 2010 Dec 20;10:774. doi: 10.1186/1471-2458-10-774
Copyright ©2010 Menza et al; licensee BioMed Central Ltd.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (<url>http://creativecommons.org/licenses/by/2.0</url>), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 1.
Participant flow through the study.