1. Department of Obstetrics and Gynecology, San Salvatore Hospital, 67100 L’Aquila, Italy
2. Department of Clinical Medicine Life Health and Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy
3. Department of Obstetrics and Gynecology, Institute for Maternal and Child Health—IRCCS “Burlo Garofolo”, 34137 Trieste, Italy