. 2012 Aug 10;13:143. doi: 10.1186/1471-2474-13-143
Copyright ©2012 Valizadeh 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.
Survival among the case and control groups.