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机构:
Eunice Kennedy Shriver Natl Inst Child Hlth & Hum, Pregnancy Res Branch, Div Obstet & Maternal Fetal Med, Div Intramural Res,NIH,US Dept HHS,NICHD NIH DHHS, Bethesda, MD 20892 USA
Eunice Kennedy Shriver Natl Inst Child Hlth & Hum, Pregnancy Res Branch, Div Obstet & Maternal Fetal Med, Div Intramural Res,NIH,US Dept HHS,NICHD NIH DHHS, Detroit, MI 48201 USA
Univ Michigan, Dept Obstet & Gynecol, Ann Arbor, MI 48109 USA
Michigan State Univ, Dept Epidemiol & Biostat, E Lansing, MI 48824 USA Eunice Kennedy Shriver Natl Inst Child Hlth & Hum, Pregnancy Res Branch, Div Obstet & Maternal Fetal Med, Div Intramural Res,NIH,US Dept HHS,NICHD NIH DHHS, Bethesda, MD 20892 USA