Distribution of demographic, and other characteristics by quintiles of p,p′-DDT.
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资源简介：
*Vitamin D supplement: total amount of vitamin D intake by supplement during recent 1 month; outdoor activities: total frequency of walked or bicycled as part of getting to and from work, or school, or to do errands per day during recent 1 month.
创建时间：
2015-12-02
