1. Division of Maternal Fetal Medicine Unit Ospedale Cristo Re, University of Rome “Tor Vergata”, Roma, Italy
2. Division of Maternal Fetal Medicine, Università Degli Studi di Roma Tor Vergata, Re Roma, Italy
3. Department of Obstetrics and Gynecology, Sechenov University, Moskva, Russia
4. Foggia University Hospital, Foggia, Italy