1. Department of Obstetrics and Gynaecology, APHP Tenon Hospital, Pierre and Marie Curie University, Paris, France;
2. Independent Researcher, Paris, France;
3. Department of Obstetrics and Gynaecology, Araba University Hospital, Vitoria-Gasteiz, Spain;
4. Department of Obstetrics and Gynaecology, Infanta Sofía University Hospital, San Sebastián de los Reyes, Madrid, Spain;
5. Department of Clinical, Surgical, Diagnostic and Paediatric Sciences, Research Centre for Reproductive Medicine, Gynaecological Endocrinology and Menopause, IRCCS San Matteo Foundation, University of Pavia, Pavia, Italy;
6. Department of Obstetrics and Gynaecology, Citadelle Hospital, University of Liège, Liège, Belgium;
7. Department of Gynaecology and Gynaecological Oncology, Vienna General Hospital, Vienna, Austria;
8. Gynmed Outpatient Clinic for Pregnancy and Family Planning, Vienna, Austria;
9. Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden