1. Department of Obstetrics and GynecologyUniversity of Brescia Brescia Italy
2. Women's Health and Perinatology Research Group, Department of Clinical Medicine, Faculty of Health SciencesUiT – The Artic University of Norway Tromsø Norway
3. Department of Obstetrics and GynecologyUniversity Hospital of North Norway Tromsø Norway
4. Local Health Unit of Pescara Pescara Italy
5. Department of Medical SciencesUniversity of Ferrara Ferrara Italy
6. Department of Clinical Science, Intervention and TechnologyKarolinska Institute and Center for Fetal Medicine, Karolinska University Hospital Stockholm Sweden