1. Department of Gynecology and Obstetrics; Baerum Hospital; Vestre Viken Hospital Trust; Rud Norway
2. Institute of Clinical Medicine; Faculty of Medicine; University of Oslo; Oslo Norway
3. Gillberg Neuropsychiatry Centre; Sahlgrenska Academy; University of Gothenburg; Ghotenburg Sweden
4. Women and Children's Division; Oslo University Hospital; Oslo Norway
5. Norwegian Resource Centre for Women's Health; Oslo University Hospital; Oslo Norway