a School of Nursing , Azienda Ospedaliera Universitaria Policlinico di Bari, University of Bari "Aldo Moro" , Bari , Italy. b Department of Obstetrics and Gynecology , Azienda Ospedaliera Universitaria Policlinico di Bari, School of Medicine, University of Bari "Aldo Moro" , Bari , Italy. c Department of Obstetrics and Gynecology , Soroka University Medical Center, School of Medicine, Ben Gurion University of the Negev , Beer Sheva , Israel. d Department of Obstetrics and Gynecology , Ospedale Macedonio Melloni, University of Milano , Milano , Italy.