1. DINOGMI Department, University of Genova, Genova, Italy;
2. Academic Unit of Obstetrics and Gynecology, Ospedale Policlinico San Martino, Genova, Italy;
3. Radiology Unit, Istituto Giannina Gaslini, Genova, Italy;
4. Obstetrics and Gynecology Unit, Istituto Giannina Gaslini, Genova, Italy