[1] Bambino Gesu Pediat Hosp, IRCCS, Allergy Unit, Area Translat Res Pediat Special, Rome, Italy
[2] Meyer Childrens Univ Hosp, Dept Pediat, Allergy Unit, Florence, Italy
[3] CHU St Justine, Dept Pediat, Allergy Immunol & Rheumatol Div, Montreal, PQ, Canada
[4] Ctr Hosp Univ Montreal, Dept Med, Allergy & Clin Immunol Div, Montreal, PQ, Canada
[5] Guys & St Thomas NHS Fdn Hosp, Evelina Childrens Hosp, Childrens Allergy Serv, London, England
[6] Kings Coll London, Paediat Allergy Grp, Dept Women & Childrens Hlth, Sch Life Course Sci, London, England