1. School of Health and Welfare, Dalarna University, Falun, Sweden
2. Department of Clinical Sciences Danderyd Hospital, Karolinska Institutet, Stockholm, Sweden
3. Department of Women’s and Children’s Health, Karolinska Institutet, Stockholm, Sweden
4. Department of Clinical Science and Education, South General Hospital Stockholm, Stockholm, Sweden
5. Department of Obstetrics and Gynecology, South General Hospital Stockholm, Stockholm, Sweden
6. WHO Collaborating Centre, Division of Gynecology and Reproduction, Karolinska University Hospital, Stockholm, Sweden
7. Department of Obstetrics and Gynecology, Danderyd Hospital, Stockholm, Sweden