1. Department of Pathology, Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea,
2. Perinatology Research Branch, Program for Perinatal Research and Obstetrics, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, MD and Detroit, MI, USA,
3. Department of Obstetrics and Gynecology, Wayne State University, Detroit, MI, USA,
4. Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, MI, USA,
5. Department of Epidemiology and Biostatistics, Michigan State University, East Lansing, MI, USA,
6. Department of Pathology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea,
7. Department of Pathology, Samsung Medical Center, University of Sungkyunkwan School of Medicine, Seoul, Korea,
8. Department of Pathology, Harper University Hospital, Detroit, MI, USA, and
9. Department of Pathology, Wayne State University, Detroit, MI, USA