1. Department of Obstetrics and Gynaecology; University of Chieti; Chieti Italy
2. Department of Obstetrics and Gynaecology; Arnas Civico Hospital; Palermo Italy
3. Department of Experimental Clinical and Medical Science, DISM, Clinic of Obstetrics and Gynecology; University of Udine; Udine Italy
4. Local Health Unit of Pescara; Pescara Italy
5. Department of Medical Sciences; University of Ferrara; Ferrara Italy
6. Department of Obstetrics and Gynecology; Catholic University of The Sacred Heart University Hospital; Rome Italy
7. Women's Health and Perinatology Research Group, Department of Clinical Medicine, Faculty of Health Sciences; UiT - The Arctic University of Norway; Tromsø Norway
8. Department of Obstetrics and Gynaecology; University Hospital of Northern Norway; Tromsø Norway