Institution: | 1. First Division of Obstetrics and Gynecology, Azienda Ospedaliero-Universitaria Pisana, Pisa, Italy;2. Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy;3. U.O. Neonatology, Azienda Ospedaliero-Universitaria Pisana, Pisa, Italy |