1. Department of Obstetrics, Gynaecology and Prenatal Diagnosis, University Medical Center GroningenUniversity of Groningen The Netherlands
2. Department of Obstetrics, Gynaecology and Prenatal DiagnosisLeiden University Medical Center Leiden The Netherlands
3. Department of Obstetrics and Gynaecology, Division of Obstetrics and Prenatal MedicineErasmus MC University Medical Center Rotterdam The Netherlands
4. Department of ObstetricsAcademic Medical Center Amsterdam Amsterdam The Netherlands
5. Department of Obstetrics, Gynaecology and Prenatal DiagnosisRadboud University Medical Center Nijmegen The Netherlands
6. Department of Obstetrics, Gynaecology and Prenatal DiagnosisUniversity Medical Center Utrecht Utrecht The Netherlands
7. Department of Obstetrics, Gynaecology and Prenatal Diagnosis, University Medical CenterGrow School for Oncology and Medical Biology Maastricht The Netherlands
8. Department of Obstetrics, Gynaecology and Prenatal DiagnosisVU University Medical Center Amsterdam The Netherlands
9. Department of PediatricsUniversity Medical Center Groningen, University of Groningen The Netherlands