1. Unitat de Rinologia i Clínica de l'Olfacte; Servei d'ORL; Hospital Clínic; Clinical & Experimental Respiratory Immunoallergy; IDIBAPS; Barcelona Spain
2. University Hôpital Arnaud de Villeneuve and INSERM; Montpellier France
3. Department of Oto-Rhino-Laryngology; Upper Airway Research Laboratory (URL); Ghent University Hospital; Ghent Belgium
4. Department of Internal Medicine; Respiratory Diseases and Allergy Clinic; University of Genoa; Genoa Italy
5. Department of Dermatology; Hospital del Mar; Universitat Autònoma; Barcelona Spain
6. Department of Immunology, Rheumatology and Allergy; Medical University of Lodz; Lodz Poland
7. Department of Pediatrics and Child Health, and Department of Immunology; University of Manitoba; Winnipeg Canada
8. Department of Dermatology and Allergy; Allergie-Centrum-Charité; Charité - Universitätsmedizin Berlin; Berlin Germany
9. University of Edinburgh; Edinburgh UK
10. Department of Allergy and Rhinology; Royal National Throat, Nose and Ear Hospital; London UK