1. Department of Obstetrics and Gynecology Fondazione Policlinico Tor Vergata, Università di Roma Tor Vergata, Roma, Italy
2. Department of Obstetrics and Gynecology Chieti, Università di Chieti, Chieti, Italy
3. Department of Surgery Fondazione Policlinico Tor Vergata, Università di Roma Tor Vergata, Roma, Italy
4. Department of Obstetrics and Gynecology Ospedale San Paolo Civitavecchia, Roma, Italy