1. Department of Obstetrics and Gynecology, San Martino Hospital and National Institute for Cancer Research, University of Genoa, Genoa, Italy.
2. Department of Obstetrics and Gynecology, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy.
3. Unit of Anatomy and Histopathology, San Martino Hospital and National Institute for Cancer Research, University of Genoa, Genoa, Italy.
4. Laboratoire d'Anatomie Pathologique, Centre Regional Hospitalier Universitaire de Montpellier, Montpellier, France.