1. Department of Obstetrics and Gynaecology, Araba University Hospital, Vitoria-Gasteiz, Spain;
2. Department of Obstetrics and Gynaecology, Infanta Sofia University Hospital, Madrid, Spain;
3. Department of Clinical, Surgical, Diagnostic and Paediatric Sciences, Research Centre for Reproductive Medicine, Gynaecological Endocrinology and Menopause, IRCCS San Matteo Polyclinic, University of Pavia, Pavia, Italy;
4. Department of Obstetrics and Gynaecology, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium;
5. Gynmed Family Planning Clinic, Vienna, Austria;
6. Department of Women’s and Children’s Health, Karolinska Institute, Stockholm, Sweden;
7. Department of General Gynaecology and Gynaecological Oncology, Medical University of Vienna, Vienna, Austria;
8. Department of Obstetrics and Gynaecology, APHP Tenon Hospital, Pierre and Marie Curie University, Paris, France