1. Department of Obstetrics and Gynecology, University of Utah Health Sciences Center, Salt Lake City, Utah
2. Perinatology Research Branch, National Institute of Child Health and Human Development, NIH/DHHS, Bethesda, Maryland, USA
3. Department of Obstetrics and Gynecology, Wayne State University, Detroit, Michigan, USA
4. Department of Pathology, Wayne State University, Detroit, Michigan, USA
5. Center for Perinatal Diagnosis and Research (CEDIP), Sotero del Rio Hospital, Universidad Catolica de Chile, Puente Alto, Chile
6. Department of Obstetrics and Gynecology, Soroka Medical Center, Ben Gurion University of the Negev, Beer Sheva, Israel