Additional file 2.
Study sample size by country and sex, World Health Survey 2002–04. Displays the study sample size of men and women (aged 18 or higher) from 41 low- and middle-income countries that participated in the 2002–04 World Health Survey.
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Hosseinpoor et al. BMC Public Health 2012 12:474 doi:10.1186/1471-2458-12-474