. 2012 Jan 30;10:4. doi: 10.1186/1546-0096-10-4
Copyright ©2012 Gupta and Sehgal; 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 3.
