[1] Tampere Univ Hosp, Dept Paediat, Tampere, Finland
[2] Tampere Univ, Fac Med & Hlth Technol, Tampere, Finland
[3] Tampere Univ Hosp, Allergy Ctr, Tampere, Finland
[4] Univ Tampere, Tampere Ctr Child Hlth Res, Tampere, Finland
[5] Univ Helsinki, Dept Publ Hlth, Helsinki, Finland
[6] Tampere Univ, Fac Social Sci, Tampere, Finland
[7] Karolinska Inst, Inst Environm Med, Stockholm, Sweden
[8] Univ Manitoba, Max Rady Coll Med, Rady Fac Hlth Sci, Dept Pediat & Child Hlth, Winnipeg, MB, Canada
[9] Res Inst Manitoba, Childrens Hosp, Winnipeg, MB, Canada
[10] Univ Manitoba, Fac Agr & Food Sci, Dept Food & Human Nutr Sci, Winnipeg, MB, Canada
[11] George & Fay Yee Ctr Healthcare Innovat, Winnipeg, MB, Canada
[12] Karolinska Inst, Dept Clin Sci & Educ, Sodersjukhuset, Stockholm, Sweden
[13] Ctr Occupat & Environm Med, Stockholm, Sweden
[14] Sachs Childrens & Youth Hosp, Stockholm, Sweden