[1] Tampere Univ Hosp Tampere, Allergy Ctr, PL 2000, Tampere 33521, Finland
[2] Univ Tampere, Pediat Res Ctr, Tampere, Finland
[3] Univ Calgary, Cumming Sch Med, Dept Med, Div Rheumatol, Calgary, AB, Canada
[4] McGill Univ, Dept Pediat, Div Allergy & Clin Immunol, Montreal, PQ, Canada
[5] Tampere Univ, Fac Social Sci, Tampere, Finland
[6] Helsinki Univ Hosp, Skin & Allergy Hosp, Helsinki, Finland
[7] Univ Helsinki, Helsinki, Finland
[8] Queens Univ, Dept Med, Div Dermatol, Kingston, ON, Canada
[9] Stanford Univ, Dept Pediat, Sch Med, Div Allergy Immunol & Rheumatol, Stanford, CA 94305 USA
[10] Food Allergy Canada, Toronto, ON, Canada
[11] Univ British Columbia, Dept Pediat, Div Allergy & Immunol, Vancouver, BC, Canada