1. Department of Obstetrics and Gynecology; University of Brescia; Brescia Italy
2. Unit of Biostatistics; Department of Molecular and Translational Medicine; University of Brescia; Brescia Italy
3. Department of Obstetrics and Gynecology; University of Parma; Parma Italy
4. Department of Clinical Science, Intervention & Technology; Karolinska Institute and Center for Fetal Medicine; Karolinska University Hospital; Stockholm Sweden
5. Women's Health and Perinatology Research Group; Department of Clinical Medicine; UiT-The Arctic University of Norway and University Hospital of North Norway; Tromsø Norway