1. Department of Maternal and Child Health, “Santa Maria della Misericordia” University Hospital, Azienda Sanitaria Universitaria Friuli Centrale (ASUFC), 33100 Udine, Italy
2. Department of Medicine (DAME), Università degli Studi di Udine, Via delle Scienze, 206, 33100 Udine, Italy
3. Obstetric-Gynecologic Unit, General Regional Hospital “F. Miulli”, Acquaviva delle Fonti, 70021 Bari, Italy