1. Department of Gynecology and Obstetrics, ASST Crema - Ospedale Maggiore, Crema, Italy
2. Department of Gynecology and Obstetrics, Isola Tiberina Hospital - Gemelli Isola, Rome, Italy
3. Division of Gynaecology and Obstetrics, Santa Maria Annunziata Hospital, USL Toscana Centro, Florence, Italy
4. Department of Science of Woman, Child and Public Health, Fondazione Policlinico Universitario A. Gemelli IRCCS, Università Cattolica del Sacro Cuore, Roma, Italy