1. 1st Department of Obstetrics and Gynaecology, Papageorgiou General Hospital, School of Medicine, Aristotle University of Thessaloniki, 54643 Thessaloniki, Greece
2. Life Expert Centre, 3000 Leuven, Belgium
3. Department of Medical and Surgical Sciences, Institute of Obstetrics and Gynecology, University of Foggia, 71121 Foggia, Italy
4. Department of Obstetrics and Gynecology, Hospital de La Citadelle, University of Liege, 4000 Liege, Belgium