1. Department of Obstetrics and Gynaecology, SS. Annunziata Hospital; G. D'Annunzio University of Chieti-Pescara; Italy
2. Fetal Medicine Unit, Division of Developmental Sciences; St. George's University of London; London UK
3. Department of Obstetrics and Gynaecology; University of Rome; Rome Italy
4. Department of Medicine and Aging Sciences; University of Chieti-Pescara; Italy
5. Department of Clinical Medicine, Faculty of Health Sciences, UiT-The Arctic University of Norway, Department of Obstetrics and Gynaecology; University Hospital of Northern Norway; Tromsø Norway