1. Department of Obstetrics and Gynecology, Democritus University of Thrace, 68100 Alexandroupolis, Greece
2. Midwifery Department of Neonatology, University Hospital Alexandra, 11528 Athens, Greece
3. 1st Department of Obstetrics and Gynecology, Papageorgiou Hospital, Aristotle University of Thessaloniki, 56429 Thessaloniki, Greece
4. Department of Obstetrics and Gynecology, Helena Venizelou Maternity Hospital, 11521 Athens, Greece
5. Midwifery Department, University of West Attica, 12243 Athens, Greece