1. Department of Obstetrics and Gynecology Radboud University Medical Center Nijmegen the Netherlands
2. Department of Obstetrics and Gynecology Canisius Wilhelmina Hospital Nijmegen the Netherlands
3. Department of Obstetrics and Gynecology Ghent University Hospital Ghent Belgium
4. Department of Obstetrics and Gynaecology Queen Elizabeth Hospital University Hospitals Birmingham NHS Foundation Trust Birmingham UK
5. Department of Obstetrics and Gynecology Maxima Medical Center Veldhoven the Netherlands
6. Department of Gynecology and Reproductive Medicine University Medical Center Utrecht Utrecht the Netherlands