1. Fetal Medicine Department, Rosie Hospital; Cambridge University Hospitals NHS Foundation Trust; Cambridge UK
2. Department of Obstetrics and Gynaecology; Stavanger University Hospital; Stavanger Norway
3. National Center for Fetal Medicine; Trondheim University Hospital (St Olavs Hospital); Trondheim Norway
4. Delivery Unit, Rosie Hospital; Cambridge University Hospitals NHS Foundation Trust; Cambridge UK
5. Women's Health Academic Centre; King's College London, King's Health Partners, St. Thomas' Hospital; London UK
6. 46 Wimpole St; London UK
7. Department of Development and Regeneration; Katholieke Universiteit Leuven; Leuven Belgium