1. Reproductive Medicine; Department of Obstetrics and Gynecology; Karolinska University Hospital; Stockholm Sweden
2. Department of Oncology-Pathology; Karolinska Institute; Stockholm Sweden
3. Department of Gynecology; Oslo University Hospital; Oslo Norway
4. Tampere University Hospital; Tampere Finland
5. Sahlgrenska University Hospital; Gothenburg Sweden
6. Linköping University Hospital; Linköping Sweden
7. Skåne University Hospital; Malmö Sweden
8. Rigshospitalet University Hospital; Copenhagen Denmark
9. Aarhus University Hospital; Aarhus Denmark
10. Odense University Hospital; Odense Denmark
11. Helsinki University Hospital; Helsinki Finland
12. Oulu University Hospital and University of Oulu; Oulu Finland
13. ART Medica; Reykjavik Iceland
14. Turku University Hospital; Turku Finland
15. Kuopio University Hospital; Kuopio Finland
16. Örebro University Hospital; Örebro Sweden
17. Department of Women's and Children's Health; Uppsala University Hospital; Uppsala Sweden
18. Department of Clinical Science, Intervention and Technology; Division of Obstetrics and Gynecology; Karolinska Institute; Stockholm Sweden
19. Laboratory of Reproductive Biology; University of Copenhagen; Copenhagen Denmark