1. Department of Experimental Clinical and Medical Science; DISM; Clinic of Obstetrics and Gynecology; University of Udine; Udine
2. Department of Maternal Fetal Medicine; Catholic University of The Sacred Heart; Rome Italy
3. Fetal medicine Unit; Division of Developmental Sciences; St. George's University of London; London UK
4. Local Health Unit of Pescara; Pescara
5. Department of Medical Sciences; University of Ferrara; Ferrara Italy
6. Department of Clinical Medicine; Faculty of Health Sciences; UiT - the Arctic University of Norway; Tromsø Norway