1. Department of Obstetrics and Gynaecology, SS. Annunziata Hospital; G. D'Annunzio University of Chieti-Pescara; Chieti Italy
2. Fetal Medicine Unit, St George's University of London and St George's University Hospitals NHS Foundation Trust; Molecular and Clinical Sciences Research Institute; London UK
3. Department of Obstetrics and Gynaecology; Fondazione Poliambulanza; Brescia Italy
4. Department of Medicine and Aging Sciences; University of Chieti-Pescara; Chieti Italy
5. Department of Obstetrics and Gynaecology; University of Rome; Rome Italy
6. Women's Health and Perinatology Research Group, Department of Clinical Medicine, Faculty of Health Sciences; UiT - The Arctic University of Norway; Tromsø Norway
7. Department of Obstetrics and Gynaecology; University Hospital of Northern Norway; Tromsø Norway