1. Department of Obstetrics and Gynecology, University of Insubria, Varese, Italy
2. Department of Gynecology, Istituto di Ricovero e Cura a Carattere Scientifico Humanitas Clinical Institute, Rozzano, Italy
3. Department of Obstetrics and Gynecology, Istituto di Ricovero e Cura a Carattere Scientifico San Raffaele Hospital, Milan, Italy