1. Department of Obstetrics and Gynecology, Fondazione IRCCS Policlinico San Matteo; University of Pavia; Pavia; Italy
2. Unit of Surgical Pathology; Azienda Ospedaliero-Universitaria di Parma; Parma; Italy
3. Department of Pathology, Fondazione IRCCS Policlinico San Matteo; University of Pavia; Pavia; Italy