[1] Uppsala Univ, Dept Womens & Childrens Hlth, Uppsala, Sweden
[2] Karolinska Inst, Dept Clin Sci Intervent & Technol CLINTEC, Obstet & Gynecol, Stockholm, Sweden
[3] Uppsala Univ, Dept Immunol Genet & Pathol, Uppsala, Sweden
[4] Uppsala Univ, Ctr Clin Res Sormland, Eskilstuna, Sweden