. 2011 Jan 18;15(1):R26. doi: 10.1186/cc9973
Copyright ©2011 Lossius 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.
A search diagram according to the PRISMA statement.