. 2012 Oct 8;12:849. doi: 10.1186/1471-2458-12-849
Copyright ©2012 Wu 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 2.
Distribution of ESS scores in the sample.