1. Department of Obstetrics and Gynaecology, Hvidovre Hospital, University of Copenhagen, Kettegaard Alle 30, Hvidovre, Denmark
2. Obstetrics and Gynaecology, University of Helsinki and Helsinki University Hospital, Haartmaninkatu 2, Helsinki, Finland
3. Department of Obstetrics and Gynaecology, Institute of Clinical Sciences, Sahlgrenska Academy, Gothenburg University, Sahlgrenska University Hospital East, Gothenburg, Sweden
4. Department of Obstetrics and Gynecology, Tampere University Hospital, Teiskontie 35, Tampere, Finland
5. Faculty of Medicine and Life Sciences, University of Tampere, Arvo Ylpön Katu 34, Tampere, Finland
6. Medical and Clinical Genetics, University of Helsinki and Helsinki University Hospital, Haartmaninkatu 8, Helsinki, Finland
7. Institute for Molecular Medicine Finland, Helsinki Institute of Life Science, University of Helsinki, Tukhomankatu 8, Helsinki, Finland
8. Fertility Clinic, Rigshospitalet, Copenhagen University Hospital, Blegdamsvej 9, Copenhagen, Denmark
9. Livio IVF-klinikken Oslo, Sørkedalsveien 10A, Oslo, Norway
10. Spiren Fertility Clinic, Norwegian Institute of Public Health, PO Box 222 Skøyen, Oslo, Norway
11. Centre for Fertility and Health, Norwegian Institute of Public Health, PO Box 222 Skøyen, Oslo, Norway
12. Department of Obstetrics and Gynaecology, Institute of Clinical Sciences, Sahlgrenska Academy, Gothenburg University, Reproductive Medicine, Sahlgrenska University Hospital, Gothenburg, Sweden