1. Division of Public Health Sciences, Department of Health Sciences; Karlstad University; Karlstad Sweden
2. Department of Women's and Children's Health; Uppsala University; Uppsala Sweden
3. Department of Women's and Children's Health; Uppsala University, Uppsala; Research and Development Centre; Sörmland County Council Eskilstuna Sweden
4. Division of Public Health Sciences, Department of Health Sciences, Karlstad; Department of Women's and Children's Health; Karlstad University, Uppsala University; Uppsala Sweden