1. Department of Obstetrics and Gynecology Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico Milan Italy
2. Department of Clinical Sciences and Community Health University of Milan Milan Italy
3. Verona University Hospital Verona Italy
4. Department of Obstetrics and Gynecology AOUI Verona Verona Italy
5. Department of Obstetrics and Gynecology Centre of Perinatal and Reproductive Medicine University of Perugia Perugia Italy