1. Laboratory of Immunogenetics and Allergology; CRP-Santé; Luxembourg; Luxembourg
2. Unit of Immunology and Allergology; Centre Hospitalier de Luxembourg; Luxembourg; Luxembourg
3. Allergy Division; Department of Chest Diseases; University Hospital; Strasbourg; France
4. Association pour la Recherche et pour l'Information médicale en Allergologie et en Environnement; Strasbourg; France
5. Department of Immunology; CRP-Santé; Luxembourg; Luxembourg
6. Department of Allergology; Paul-Ehrlich Institut; Langen; Germany