. 2011 Apr;3(4):179–184. doi: 10.4297/najms.2011.3179
Copyright: © North American Journal of Medical Sciences
This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Table 2.
Comparison of results by region
