[1] Uppsala Univ, Vastmanland Cty Hosp, Ctr Clin Res, Vasteras, Sweden
[2] Uppsala Univ, Dept Womens & Childrens Hlth, Uppsala, Sweden
[3] Karolinska Inst, Dept Clin Sci, Div Obstet & Gynecol, Solna, Sweden
[4] Danderyd Hosp, Stockholm, Sweden
[5] Umea Univ, Dept Epidemiol & Global Hlth, Umea, Sweden
[6] Uppsala Univ, Dept Psychol, Div Clin Psychol, Uppsala, Sweden
[7] Malardalen Univ, Sch Hlth Care & Social Welf, Div Caring Sci, Vasteras, Sweden
[8] Vastmanlands Sjukhus, Ortopedklin Fysioterapi & Arbetsterapi, Plan 1, S-72189 Vasteras, Sweden