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; U.S. 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. Department of Obstetrics and Gynecology; Wayne State University School of Medicine; Detroit MI USA
6. Department of Pathology; University of Ulsan College of Medicine; Seoul Korea
7. Department of Pathology; Haeundae Paik Hospital; Inje University College of Medicine; Busan Korea
8. Department of Pathology; Samsung Medical Center; Sungkyunkwan University School of Medicine; Seoul Korea
9. Department of Pathology; Hutzel Women's Hospital; Wayne State University School of Medicine; Detroit MI USA
10. Department of Obstetrics and Gynecology; Seoul National University College of Medicine; Seoul Korea