1. Clinic of Obstetrics and Gynecology of Udine, Azienda Sanitaria Universitaria Friuli Centrale, Piazzale Santa Maria della Misericordia 15, 33100 Udine, Italy
2. Department of Gynecology and Obstetrics, School of Medicine of Udine, 33100 Udine, Italy
3. Dipartimento di Area Medica, Università degli Studi di Udine, 33100 Udine, Italy