1. Department of Obstetrics and Gynecology American University of Beirut Medical Center Beirut Lebanon
2. University Medical Centre Utrecht The Netherlands
3. Department of Obstetrics and Gynecology University of North Carolina Chapel Hill NC USA
4. Center of Obstetrics and Gynecology Vilnius University Medical Faculty Vilnius Lithuania
5. Department of Obstetrics and Gynecology Chonnam National University Medical School Gwangju Korea
6. S.I.E.P The Society for the Investigation of Early Pregnancy New York NY USA