. 2012 Jun 8;12:66. doi: 10.1186/1471-230X-12-66
Copyright ©2012 Yen 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.
CONSORT 2010 flow chart illustrating the study progress.