1. Department of Obstetrics and Gynaecology Royal Free London Teaching Hospital London UK
2. Department of Obstetrics and Gynecology American University of Beirut Medical Center Beirut Lebanon
3. Department of Obstetrics University Medical Center Utrecht the Netherlands
4. Center of Obstetrics and Gynaecology Vilnius University Faculty of Medicine Vilnius Lithuania
5. Department of Obstetrics and Gynaecology Faculty of Medicine and Health Sciences Universiteit Stellenbosch Stellenbosch South Africa