[1] McGill Univ, Ctr Hlth, Div Clin Immunol & Allergy, Montreal, PQ, Canada
[2] McGill Univ, Ctr Hlth, Div Pediat Clin Immunol & Allergy, Montreal, PQ, Canada
[3] McGill Univ, Ctr Hlth, Div Clin Epidemiol, Montreal, PQ, Canada
[4] McGill Univ, Dept Biostat & Epidemiol, Montreal, PQ, Canada
[5] Assoc Quebec Allergy Alimentaires, Quebec City, PQ, Canada
[6] McGill Univ, Sch Dietet & Human Nutr, Div Clin Immunol & Allergy, Div Clin Epidemiol, Ste Ann Belleuve, PQ, Canada
[7] McGill Univ, Ctr Hlth, Montreal, PQ H3A 2T5, Canada