1. Department of Obstetrics and Gynecology University of North Carolina Chapel Hill NC USA
2. Departments of Public Health and Obstetrics and Gynecology Malawi College of Medicine Blantyre Malawi
3. University Medical Center Utrecht The Netherlands
4. SIEP, The Society for the Investigation of Early Pregnancy New York NY USA
5. Department of Obstetrics and Gynecology American University of Beirut Medical Center Beirut Lebanon