[1] Univ Gothenburg, Sahlgrenska Acad, Inst Clin Sci, Dept Obstet & Gynecol, Gothenburg, Sweden
[2] Ostfold Hosp Trust, Dept Gynecol & Obstet, Kalnes, Norway
[3] Sahlgrens Univ Hosp, Dept Obstet & Gynecol, Reg Vastra Gotaland, Gothenburg, Sweden
[4] Univ Oslo, Inst Clin Med, Fac Med, Oslo, Norway
[5] Norwegian Inst Publ Hlth, Dept Virol, Oslo, Norway
[6] Ostfold Hosp Trust, Genet Unit, Ctr Lab Med, Kalnes, Norway
[7] Oslo Univ Hosp, Div Obstet & Gynecol, Oslo, Norway
[8] Oslo Univ Hosp, Div Pediat & Adolescent Med, Oslo, Norway
[9] Norwegian Inst Publ Hlth, Dept Chem Toxicol, Oslo, Norway
[10] Karolinska Univ Hosp, Astrid Lindgren Childrens Hosp, Stockholm, Sweden
[11] Karolinska Inst, Dept Womens & Childrens Hlth, Stockholm, Sweden
[12] Inst Publ Hlth, Div Hlth Data & Digitalizat, Dept Genet & Bioinformat, Oslo, Norway
[13] Univ Gothenburg, Sahlgrenska Acad, Inst Biomed, Dept Lab Med, Gothenburg, Sweden
[14] Chalmers Univ Technol, Dept Math Sci, Gothenburg, Sweden
[15] Oslo Univ Hosp, Dept Dermatol & Venereol, Oslo, Norway