. 2014 Jun;5(6):703–709.
Copyright: © International Journal of Preventive Medicine
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.
Proportion of socioeconomic status among participants
