. 2009 Jun 27;35:18. doi: 10.1186/1824-7288-35-18
Copyright © 2009 Ghirri 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.
The figure shows all the hospitals included in the study.