1. Department of Obstetrics and Gynecology, Soroka University Medical Center, School of Medicine, Faculty of Health Sciences, Ben Gurion University of the Negev, Beer Sheva, Israel,
2. Department of Epidemiology, Faculty of Health Sciences, Ben Gurion University of the Negev, Beer Sheva, Israel,
3. Department of Obstetrics and Gynecology, Azienda Ospedaliera Universitaria Policlinico Di Bari, School of Medicine, University of Bari “Aldo Moro”, Bari, Italy,
4. Department of Neonatology, Soroka University Medical Center, School of Medicine, Faculty of Health Sciences, Ben Gurion University of the Negev, Beer Sheva, Israel, and
5. Maternity Department D, Obstetrical Day Care Unit, Soroka University Medical Center, School of Medicine, Faculty of Health Sciences, Ben Gurion University of the Negev, Beer Sheva, Israel