[1] Hop Sacre Coeur, Dept Emergency Med, Montreal, PQ H4J 1C5, Canada
[2] Univ Montreal, Montreal, PQ, Canada
[3] Hlth Canada, Food Directorate, Ottawa, ON K1A 0L2, Canada
[4] Montreal Childrens Hosp, Montreal, PQ H3H 1P3, Canada
[5] McGill Univ, Montreal, PQ, Canada
[6] McGill Univ, Dept Paediat, Ctr Hlth, Div Paediat Allergy & Clin Immunol, Montreal, PQ, Canada
[7] McGill Univ, Dept Med, Ctr Hlth, Div Clin Epidemiol, Montreal, PQ, Canada
[8] McGill Univ, Dept Med, Ctr Hlth, Div Allergy & Clin Immunol, Montreal, PQ, Canada