1 Department of Human Pathology of Adult and Childhood "G. Barresi" Unit of Gynecology and Obstetric, University of Messina, Messina, Italy.
2 Division of Gynecologic Oncology, Fondazione Policlinico Universitario A. Gemelli Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy.
3 Institute of Obstetrics and Gynecology, Universita' Cattolica del Sacro Cuore, Rome, Italy.