. 2006 Mar 15;6:13. doi: 10.1186/1471-2288-6-13
Copyright © 2006 Kupek; 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.
Statistical problems needing SEM approach.