1. School of Nursing, Azienda Ospedaliera Universitaria Policlinico di Bari, University of Bari “Aldo Moro”, Bari, Italy;
2. Department of Obstetrics and Gynecology, Azienda Ospedaliera Universitaria Policlinico di Bari, School of Medicine, University of Bari “Aldo Moro”, Bari, Italy;
3. Department of Obstetrics and Gynecology, Soroka University Medical Center, School of Medicine, Ben Gurion University of the Negev, Beer Sheva, Israel;
4. Department of Obstetrics and Gynecology, Ospedale Macedonio Melloni, University of Milano, Milano, Italy