1. Department of Obstetrics and Gynaecology, University of Chieti, Chieti, Italy
2. Department of Paediatric Cardiology, Astrid Lindgrens Children’s Hospital/Karolinska University Hospital, Stockholm, Sweden
3. Department of Maternal Fetal Medicine, Ospedale Cristo Re Roma, University of Rome “Tor Vergata”, Rome, Italy
4. Department of Obstetrics and Gynaecology, The First I.M. Sechenov Moscow State Medical University, Moscow, Russia
5. Fetal Medicine Unit, St. George’s Hospital, London, UK
6. Department of Obstetrics and Gynaecology, Ospedali Riuniti, University of Foggia, Foggia, Italy
7. Department of Clinical Sciences, Intervention and Technology, Karolinska Institute, Stockholm, Sweden
8. Center for Fetal Medicine, Karolinska University Hospital, Stockholm, Sweden
9. Department of Clinical Medicine, Faculty of Health Sciences, UiT – The Arctic University of Norway, Tromsø Norway