1. Department of Experimental and Clinical Medicine, Division of Obstetrics and Gynecology; University of Pisa; Pisa Italy
2. Department of Neonatology; Nuovo Ospedale Santo Stefano; Prato Italy
3. Department of Pediatrics; Meyer Pediatric Hospital; Florence Italy
4. Pediatric Cardiology; Tuscany Region-National Centre for Research Foundation, Ospedale del Cuore; Massa Italy