. 2014 Feb 20;7:98. doi: 10.1186/1756-0500-7-98
Copyright © 2014 Thompson 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 credited.