We need a validated questionnaire for prevalence study. Please do inform us about such questionnaire.
I have found this questionnaire.. Not for pregnant women... But worth looking....
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2865138/table/T1/
thank you for sharing your valuable suggestions
In Colombia, we was studying this topic in postmenopausal woman and, we don´t have correlation between variables.
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