. 2012 Nov 6;4:41. doi: 10.1186/1758-2555-4-41
Copyright ©2012 Christanell 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.
HHD Test for measuring passive knee extension.