1. Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, IRCCS-San Martino Hospital, Genoa, Italy
2. Obstetrics and Gynecology Unit of Florence, Firenze, Italy
3. Department of Public Health, University of Naples Federico II, Naples, Italy
4. Obstetrics and Gynecology Unit of Pisa, Pisa, Italy