. 2011 Oct 28;8:120. doi: 10.1186/1479-5868-8-120
Copyright ©2011 Harrington 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.
ActivPAL placement.