1. Perinatology Research Branch; NICHD/NIH/DHHS; Bethesda MD
2. Detroit MI USA
3. Department of Obstetrics and Gynecology; Wayne State University; Detroit MI USA
4. Detroit Medical Center; Hutzel Women's Hospital; Detroit MI USA
5. Department of Obstetrics and Gynecology; University of Michigan; Ann Arbor MI USA
6. Department of Epidemiology and Biostatistics; Michigan State University; East Lansing MI USA
7. Department of Molecular Obstetrics and Genetics; Wayne State University; Detroit MI USA