1. Department of Obstetrics and Gynecology, City Hospital of Aschaffenburg, Aschaffenburg, Germany
2. Department of Obstetrics and Gynecology, Medical and Health Science Centre, University of Debrecen, Hungary
3. Department of Obstetrics and Gynecology, GPR Hospital Rüsselsheim, Rüsselsheim, Germany
4. Department of Obstetrics and Gynecology, Democritus University of Thrace, Greece
5. Department of Neonatology, City Hospital, Aschaffenburg, Germany