1. Department of Obstetrics and Gynecology, Wayne State University/Hutzel Women's Hospital, Detroit, Michigan
2. Perinatology Research Branch, NICHD/NIH/DHHS, Bethesda, Maryland
3. Department of Pathology, Wayne State University/Hutzel Women's Hospital, Detroit, Michigan, USA
4. Department of Obstetrics and Gynecology, Soroka Medical Center, Ben Gurion University of the Negev, Beer Sheva, Israel