1 Section of Obstetrics and Gynaecology, Department of Surgical and Biomedical Sciences, Santa Maria della Misericordia Hospital, University of Perugia, Perugia, Italy.
2 Division of Radiology, Budrio Hospital, Bologna, Italy.
3 Division of Radiology, Tivoli Hospital, Rome Italy.
4 Section of Diagnostic Imaging, Department of Surgical and Biomedical Sciences, Santa Maria della Misericordia Hospital, University of Perugia, Perugia, Italy.