1. Department of Obstetrics and Gynecology; Arnas Civico Hospital; Palermo Italy
2. Department of Obstetrics and Gynecology; Division of Maternal-Fetal Medicine; New York University SOM; New York NY USA
3. Center for Medical Education and Clinical Research (CEMIC); University Hospital; Buenos Aires Argentina
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; Rome Italy
7. Department of Obstetrics and Gynecology; Fondazione Poliambulanza; Brescia Italy
8. Women's Health and Perinatology Research Group; Department of Clinical Medicine; Faculty of Health Sciences; UiT-The Arctic University of Norway; Tromsø Norway
9. Department of Obstetrics and Gynecology; University Hospital of Northern Norway; Tromsø Norway