1 Azienda USL Toscana Centro, Gynecology and Obstetric Department, Santa Maria Annunziata Hospital, Florence, Italy.
2 Department of Science of Woman, Child and Public Health, Fondazione Policlinico Universitario A. Gemelli IRCCS, Università Cattolica del Sacro Cuore, Rome, Italy.
3 Division of Gynecology and Obstetrics, Fatebenefratelli Isola Tiberina Gemelli Hospital, Rome, Italy.