1. Division of Obstetrics and Gynecology, Department of Maternal, Neonatal and Infant Medicine, University Hospital “Degli Infermi”, 13875 Ponderano, Italy
2. Division of Pediatrics and Neonatology, Department of Maternal, Neonatal and Infant Medicine, University Hospital “Degli Infermi”, 13875 Ponderano, Italy
3. Department of Maternal, Neonatal and Infant Medicine, University of Torino School of Medicine, 10125 Turin, Italy
4. Division of Obstetrics and Gynecology, Hopital Beauregard, AUSL Valleè d’Aoste, 11100 Aosta, Italy