1. Gynecologic Oncology Unit, Department of Experimental Clinical Oncology, IRCCS “Regina Elena” National Cancer Institute, 00144 Rome, Italy
2. Unit of Gynecologic Oncology, ARNAS “Civico-Di Cristina-Benfratelli”, Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties (PROMISE), University of Palermo, 90127 Palermo, Italy
3. Department of Obstetrics and Gynecology, “Filippo Del Ponte” Women and Children Hospital, University of Insubria, 21100 Varese, Italy
4. Biostatistical Unit, IRCCS “Regina Elena” National Cancer Institute, 00144 Rome, Italy
5. Department of Obstetrics and Gynecology, Helena Venizelou Hospital, 115 21 Athens, Greece