[1] Wayne State Univ, Hutzel Womens Hosp, Perinatol Res Branch, NICHD,NIH,DHHS, Detroit, MI 48201 USA
[2] Eunice Kennedy Shriver Natl Inst Child Hlth & Hum, Perinatol Res Branch, Program Perinatal Res & Obstet, Div Intramural Res,NIH, Bethesda, MD USA
[3] Eunice Kennedy Shriver Natl Inst Child Hlth & Hum, Perinatol Res Branch, Program Perinatal Res & Obstet, Div Intramural Res,NIH, Detroit, MI USA
[4] Univ Michigan, Dept Obstet & Gynecol, Ann Arbor, MI 48109 USA
[5] Michigan State Univ, Dept Epidemiol & Biostat, E Lansing, MI 48824 USA
[6] Wayne State Univ, Dept Mol Obstet & Genet, Detroit, MI 48201 USA
[7] Wayne State Univ, Sch Med, Dept Obstet & Gynecol, Detroit, MI 48201 USA
[8] Hosp Dr Sotero del Rio, Ctr Res & Innovat Maternal Fetal Med CIMAF, Santiago, Chile
[9] Pontificia Univ Catolica Chile, Dept Obstet & Gynecol, Santiago, Chile
[10] Seoul Natl Univ, Coll Med, Dept Obstet & Gynecol, Seoul, South Korea