1. Department of Obstetrics University Medical Center Utrecht The Netherlands
2. Department of Obstetrics and Gynecology University of North Carolina Chapel Hill USA
3. SIEP The Society for the Investigation of Early Pregnancy New York NY USA
4. Center of Obstetrics and Gynaecology Vilnius University Medical Faculty Vilnius Lithuania
5. Department of Obstetrics and Gynecology American University of Beirut Medical Center Beirut Lebanon