aDivision of Allergy, Department of Pulmonology, Allergy and Thoracic Oncology, University Hospital of Montpellier, Montpellier

bDesbrest Institute of Epidemiology and Public Health, UMR UA11 University of Montpellier – INSERM

cWHO Collaborating Centre on Scientific Classification Support, Montpellier, France

dAsthma Center and Allergy Unit, University of Verona, Verona, Italy

eDepartment of Paediatrics, CH Roubaix

fPaediatric Pneumology and Allergology Unit, CHRU Lille, France

gDepartment of Medicine, University of Verona, Verona, Italy

Correspondence to Luciana Kase Tanno, MD, PhD, Division of Allergy, Department of Pulmonology, Hôpital Arnaud de Villeneuve, University Hospital of Montpellier, 371, av. du Doyen Gaston Giraud, 34295 Montpellier cedex 5, France. Tel: +33 467336107; fax: +33 467633645; e-mail: [email protected]