1. Department of Obstetrics and Gynaecology, Angers University Hospital, Angers, France
2. Department of Obstetrics and Gynaecology, Besancon University Hospital, Besancon, France
3. Department of Obstetrics and Gynaecology, Clemenceau Medical Centre, Beirut, Lebanon
4. Baylor College of Medicine, Houston, TX, USA
5. Department of Reproductive Biology, Angers University Hospital, Angers, France