1. Perinatology Research Branch, Program for Perinatal Research and Obstetrics, Division of Intramural Research Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Department of Health and Human Services Bethesda MD and Detroit, MI USA
2. Department of Obstetrics and Gynecology University of Michigan Ann Arbor MI USA
3. Department of Epidemiology and Biostatistics Michigan State University East Lansing MI USA
4. Center for Molecular Medicine and Genetics Wayne State University Detroit MI USA
5. Harris Birthright Research Centre for Fetal Medicine King's College Hospital London UK
6. Department of Obstetrics and Gynecology University of Kentucky Lexington KY USA
7. Department of Obstetrics and Gynecology Zeynep Kamil Women and Children Diseases Education and Research Hospital Uskudar Istanbul Turkey
8. Departamento de Obstetrícia e Ginecologia Hospital do Servidor Publico Estadual ‘Francisco Morato de Oliveira’ and School of Medicine, University of São Paulo São Paulo Brazil
9. Center for Biomedical Research Population Council New York NY USA
10. Department of Obstetrics and Gynecology Wayne State University School of Medicine Detroit MI USA