作者单位:
Univ Cincinnati, Div Epidemiol, Dept Environm Hlth, Coll Med, Cincinnati, OH 45267 USA
[1]
Univ Cincinnati, Dept Obstet & Gynecol, Div Maternal Fetal Med, Coll Med, Cincinnati, OH 45267 USA
[2]
Shanghai Inst Planned Parenthood Res, Dept Epidemiol & Social Sci Reprod Hlth, Shanghai, Peoples R
[3]
发布时间
2015-09-18