1. Research Centre for Reproductive Medicine, Gynaecological Endocrinology and Menopause, IRCCS San Matteo Foundation, Department of Clinical, Surgical, Diagnostic and Paediatric Sciences, University of Pavia, Pavia, Italy;
2. Gynmed Ambulatorium, Vienna, Austria;
3. Department of Women's and Children's Health, Karolinska Institute, Stockholm, Sweden;
4. Department of Obstetrics and Gynaecology, APHP Tenon Hospital, Pierre and Marie Curie University, Paris, France;
5. Department of Gynaecology and Gynaecological Oncology, AKH-Wien, Vienna, Austria;
6. Private Medical Gynecology Clinic, Paris, France;
7. Department of Obstetrics and Gynaecology, Araba University Hospital, Vitoria-Gasteiz, Spain;
8. Department of Obstetrics and Gynaecology, Bielanski Hospital, Warsaw, Poland;
9. Department of Obstetrics and Gynaecology, Citadelle Hospital, Liège University, Liège, Belgium;
10. Department of Obstetrics and Gynaecology, Infanta Sofía University Hospital, San Sebastián de los Reyes, Madrid, Spain