1. Section of Obstetrics and Gynecology, Department of Morphology, Surgery and Experimental Medicine, Azienda Ospedaliero-Universitaria S. Anna, Università di Ferrara, Cona, Ferrara, Italy
2. Section of Obstetrics and Gynaecology, Policlinico di Abano Terme, Abano Terme, Padova, Italy
3. Department of Medical and Surgical Sciences, Institute of Obstetrics and Gynecology, University of Foggia, Foggia, Italy