[1] Univ Murcia, Virgen de la Arrixaca Univ Childrens Hosp, Pediat Resp & Allergy Unit, Murcia, Spain
[2] Univ Santiago Chile USACH, Hosp El Pino, Pediat Resp Med, Santiago, Chile
[3] Fed Univ Sao Paulo UNIFESP, Dept Pediat, Div Allergy Clin Immunol & Rheumotol, Sao Paulo, SP, Brazil
[4] Isala Clin, Pediat Pulmonol, Zwolle, Netherlands