1. Department of Medicine Obafemi Awolowo University Ile‐Ife Nigeria
2. Respiratory Epidemiology and Public Health Group National Heart and Lung Institute Imperial College London London UK
3. Department of Respiratory Medicine Ghent University Hospital Ghent Belgium
4. Odense University Hospital Odense University Odense Denmark
5. Skin and Allergy Hospital Helsinki University Helsinki Finland
6. Department of Pediatric Pneumonology and Immunology Charité‐Universitätsmedizin Berlin Berlin Germany
7. IUF – Leibniz Research Institute for Environmental Medicine Düsseldorf Germany
8. Department of Dermatology and Allergy am Biederstein Technical University Munich Munich Germany
9. Institute of Biomedicine and Molecular Immunology National Research Council Palermo Italy
10. Department of Otorhinolaryngology Academic Medical Center Amsterdam the Netherlands
11. Department of Immunology Rheumatology and Allergy Medical University of Lodz Lodz Poland
12. Faculty of Medicine University of Coimbra Coimbra Portugal
13. Section of Occupational and Environmental Medicine University of Gothenburg Gothenburg Sweden
14. Department of Medical Sciences: Respiratory Medicine and Allergology University of Uppsala Uppsala Sweden
15. CfA ‐ The Centre for Allergy Research Karolinska Institute Stockholm Sweden
16. Occupational and Environmental Medicine Umeå University Umeå Sweden
17. Clinical and Experimental Sciences Faculty of Medicine Southampton General Hospital Southampton UK
18. Department of Epidemiology Medical University of Silesia in Katowice Katowice Poland
19. Institute for Occupational Health of Republic of Macedonia Skopje Republic of Macedonia
20. Upper Airway Research Laboratory University of Ghent Ghent Belgium
21. Division of Ear, Nose, and Throat Diseases Clintec Karolinska Institute Stockholm Sweden