[1] Karolinska Inst, Dept Med Epidemiol & Biostat, Stockholm, Sweden
[2] Soderjukhuset, Obstet & Gynaecol Unit, Stockholm, Sweden
[3] Orebro Univ, Sch Med Sci, Orebro, Sweden
[4] Indiana Univ, Dept Psychol & Brain Sci, Bloomington, IN USA
[5] Karolinska Inst, Inst Environm Med, Stockholm, Sweden
[6] Karolinska Inst, Dept Womens & Childrens Hlth, Stockholm, Sweden
[7] Karolinska Univ Hosp, Obstet & Gynaecol Unit, Stockholm, Sweden
[8] Karolinska Univ Hosp, Astrid Lindgren Childrens Hosp, Pediat Allergy & Pulmonol Unit, Stockholm, Sweden