1. Department of Obstetrics and Gynecology, Hudiksvall Hospital, Hudiksvall, Sweden
2. The Norwegian Continence and Pelvic Floor Center, University Hospital of North Norway, Tromsø, Norway
3. Finnish Institute for Health and Welfare, Information Services Department, Helsinki, Finland, Karolinska Institute, Department of Molecular Medicine and Surgery, Stockholm, Sweden, and Region Stockholm, Academic Primary Health Care Centre, Stockholm, Sweden