. 2013 Mar 1;7:42. doi: 10.1186/1752-153X-7-42
Copyright ©2013 Qian et al; licensee Chemistry 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.