. 2010 Oct;2(10):478–486. doi: 10.4297/najms.2010.2478
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 1.
Sociodemographic characteristic of sample, n = 7,168
