. 2008 Sep 4;6:44. doi: 10.1186/1476-7120-6-44
Copyright © 2008 Padilla 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.
Experimental set-up.