[1] Careggi Univ Hosp, Dept Mother & Neonate, Florence, Italy
[2] Di Venere & Sarcone Hosp ASL BA, Dept Fetal Med, Altamura, Italy
[3] Integrated Univ Hosp Verona, Dept Obstet & Gynecol, Verona, Italy
[4] Univ Hosp Polyclin Paolo Giaccone, Dept Obstet & Gynecol, Palermo, Italy
[5] Magna Graecia Univ Catanzaro, Dept Obstet & Gynecol, Catanzaro, Italy
[6] Univ Parma, Dept Med & Surg, Obstet & Gynecol Unit, Parma, Italy
[7] Fdn IRCCS Ca Granda Osped Maggiore Policlin, Dept Obstet & Gynecol, Milan, Italy