[1] CHU Vaudois, Dept Med Chirurg Pediat, Unite Immunol Allergol & Rhumatol Pediat, CH-1011 Lausanne, Switzerland
[2] HUG, Dept Enfant & Adolescent, Unite Allergol, Geneva, Switzerland
[3] Natl Univ Ireland Univ Coll Cork, Dept Paediat & Child Hlth, Cork, Ireland
[4] Univ Groningen, Univ Med Ctr Groningen, Dept Paediat, Div Paediat Pulmonol & Paediat Allergy, NL-9713 AV Groningen, Pays Bas, Netherlands