1. Department of Obstetrics and Gynecology, General Regional Hospital ‘F. Miulli’, Acquaviva delle Fonti, Bari, Italy
2. Dipartimento Scienze della Salute della Donna e del Bambino, Fondazione Policlinico Universitario A. Gemelli, IRCCS, Rome, Italy
3. Department of Obstetrics and Gynecology, IRCCS Materno-Infantile Burlo Garofolo, Trieste, Italy
4. Department of Obstetrics and Gynecology, Presidio Ospedaliero Garibaldi-Nesima, Catania, Italy
5. Department of Obstetrics and Gynecology, Clinica Santa Maria, Bari, Italy
6. Obsteric & Gynecology Unit San Salvatore Hospital, MeSVA Department, University of L’Aquila, L’Aquila, Italy