1. Department of Neuroscience, Reproductive Sciences and Odontostomatology, School of Medicine, Federico II University, Naples, Italy
2. Department of Public Health, School of Medicine, Federico II University, Naples, Italy
3. Department of Woman, Child and Neonate, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
4. Obstetric Unit, Department of Medical and Surgical Sciences, University of Bologna and IRCCS Azienda Ospedaliero-Universitaria S.Orsola-Malpighi, Bologna, Italy