[1] Malmo Univ, Fac Hlth & Soc, Dept Care Sci, Malmo, Sweden
[2] Karolinska Inst, Dept Womens & Childrens Hlth, Stockholm, Sweden
[3] Karolinska Inst, Sodersjukhuset, Dept Clin Sci & Educ, Stockholm, Sweden
[4] Umea Univ, Dept Publ Hlth & Clin Med, OLIN Unit, Umea, Sweden