[1] Baylor Coll Med, Dept Obstet & Gynecol, Div Maternal Fetal Med, 6651 Main St,Suite 1096, Houston, TX 77030 USA
[2] Amniot Fluid Embolism Fdn, Vista, CA USA
[3] Eunice Kennedy Shriver Natl Inst Child Hlth & Hum, Perinatol Res Branch, Div Obstet & Maternal Fetal Med, Div Intramural Res,NIH, Bethesda, MD USA
[4] Eunice Kennedy Shriver Natl Inst Child Hlth & Hum, Perinatol Res Branch, Div Obstet & Maternal Fetal Med, Div Intramural Res,NIH, Detroit, MI USA
[5] Univ Michigan, Dept Obstet & Gynecol, Ann Arbor, MI 48109 USA
[6] Michigan State Univ, Dept Epidemiol & Biostat, E Lansing, MI 48824 USA
[7] Wayne State Univ, Ctr Mol Med & Genet, Detroit, MI USA