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