. 2008 Jun 19;8:26. doi: 10.1186/1472-6947-8-26
Copyright © 2008 Orwat 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 2.
Periodicals including most of the articles selected.