1. Department of P(a)ediatric Surgery Emma Children's Hospital Amsterdam UMC University of Amsterdam & Vrije Universiteit Amsterdam Amsterdam The Netherlands
2. Department of Obstetrics and Gynaecology Maastricht UMC + Maastricht The Netherlands
3. Department of Obstetrics University Medical Center Utrecht Utrecht The Netherlands
4. Department of Obstetrics and Gynaecology Amsterdam University Medical Centers Amsterdam The Netherlands
5. Department of Obstetrics, Gynaecology and Prenatal Diagnosis University Medical Center Groningen University of Groningen Groningen The Netherlands
6. Department of Obstetrics and Fetal Medicine Erasmus Medical Center Rotterdam The Netherlands
7. Department of Obstetrics Amsterdam UMC University of Amsterdam & Vrije Universiteit Amsterdam Amsterdam The Netherlands
8. Department of Obstetrics and Gynecology Radboud University Medical Center Nijmegen Nijmegen The Netherlands
9. Department of Obstetrics and Fetal Medicine Leiden University Medical Center Leiden The Netherlands