1. Department of Obstetrics, Gynaecology and Prenatal Diagnosis University Medical Center Groningen, University of Groningen Groningen The Netherlands
2. Department of Genetics University Medical Center Groningen, University of Groningen Groningen The Netherlands
3. Department of Obstetrics, Gynaecology and Prenatal Diagnosis Leiden University Medical Center Leiden The Netherlands
4. Division of Obstetrics and Prenatal Medicine, Department of Obstetrics and Gynecology, Erasmus MC University Medical Center Rotterdam Rotterdam The Netherlands
5. Department of Obstetrics Academic Medical Center Amsterdam Amsterdam The Netherlands
6. Department of Obstetrics, Gynaecology and Prenatal Diagnosis Radboud University Medical Center Nijmegen The Netherlands
7. Department of Obstetrics, Gynaecology and Prenatal Diagnosis University Medical Center Utrecht Utrecht The Netherlands
8. Department of Obstetrics, Gynaecology and Prenatal Diagnosis Maastricht University Medical Center, Grow School for Oncology and Medical Biology Maastricht The Netherlands
9. Department of Obstetrics, Gynaecology and Prenatal Diagnosis VU University Medical Center Amsterdam The Netherlands
10. Department of Pediatrics University Medical Center Groningen, University of Groningen Groningen The Netherlands