1. Department of Women's and Children's Health, Uppsala University, S‑751 85 Uppsala, Sweden
2. Department of Medical Sciences, Uppsala University, S‑751 85 Uppsala, Sweden
3. Department of Medical Sciences, Örebro University Hospital, S‑701 85 Örebro, Sweden
4. Department of Gynecology, Falun Hospital S‑791 31 Falun, Sweden
5. Department of Immunology, Genetics and Pathology, Uppsala University, S‑751 85 Uppsala, Sweden