[1] Wayne State Univ, Hutzel Womens Hosp, NICHD, Perinatol Res Branch,NIH,DHHS, Detroit, MI 48201 USA
[2] NICHD, Perinatol Res Branch, NIH, DHHS, Bethesda, MD USA
[3] Wayne State Univ, Sch Med, Dept Obstet & Gynecol, Detroit, MI 48201 USA
[4] Wayne State Univ, Sch Med, Dept Infect Dis, Detroit, MI 48201 USA
[5] Wayne State Univ, Ctr Mol Med & Genet, Detroit, MI 48201 USA