1. Department of Obstetrics and Gynecology, Azienda Sanitaria Universitaria Giuliano-Isontina, San Polo Hospital, Gorizia-Monfalcone (Trieste), Italy
2. Institute for Maternal and Child Health, IRCCS “Burlo Garofolo”, Trieste, Italy
3. Department of Medical, Surgical and Technological Sciences, Section of Obstetrics and Gynecology, Azienda Ospedaliero-Universitaria S. Anna, University of Ferrara, Ferrara, Italy