. 2007 Jan 15;7:8. doi: 10.1186/1472-6963-7-8
Copyright © 2007 Potisek 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.
Time-Motion Surveys.