1. Department of Otorhinolaryngology, Head and Neck Surgery; University of Cologne Medical Center; Cologne Germany
2. Institute of Medical Statistics and Computational Biology; Faculty of Medicine; University of Cologne; Cologne Germany
3. Department of Otorhinolaryngology, Head and Neck Surgery; Universitätsmedizin Mannheim, Medical Faculty Mannheim; Heidelberg University; Mannheim Germany
4. Transylvania University Brasov; Faculty of Medicine; Department of Allergy and Clinical Immunology; Brasov Romania
5. Health and Work Ability; Finnish Institute of Occupational Health; Helsinki Finland
6. Allergy Unit; IBIMA-Regional University Hospital of Málaga, ARADyAL; Málaga Spain
7. Department of Otolaryngology; Center of Allergy and Environment (ZAUM); Klinikum rechts der Isar; Technical University Munich; Munich Germany
8. ENT Department; Faculty of Medicine; Eskisehir Osmangazi University; Eskisehir Turkey
9. Allergy and Clinical Immunology; Imperial College; NHLI; London UK
10. Otorhinolaryngology; Academic Medical Centre; Amsterdam The Netherlands
11. Otorhinolaryngology; Ghent University; Ghent Belgium
12. Department of Otorhinolaryngology - Head and Neck Surgery; Medical University of Innsbruck; Medizinische Universitat Innsbruck; Innsbruck Austria
13. Department of Otorhinolaryngology; Cliniques Universitaires Saint-Luc; Brussels Belgium
14. Alergologie a klinická imunologie; Nemocnice na Homolce; Prague Czech Republic
15. Center for Rhinology and Allergology; Wiesbaden Germany
16. Department of ENT; Azienda Ausl di Imola; Imola Italy
17. Clinical and Experimental Immunoallergy; Institut d'Investigacions Biomediques August Pi i Sunyer (IDIBAPS); Barcelona Spain
18. Department of ORL; Hospital Clínic de Barcelona; Universitat de Barcelona; Barcelona Spain
19. Centro de Investigaciones Biomédicas en Red de Enfermedades Respiratorias (CIBERES); Barcelona Spain
20. Department of Otorhinolaryngology; Medical Faculty; Kirikkale University; Kirikkale Turkey
21. Department of Pediatrics; Referral Centre for Food Allergy; Padua General University Hospital; Padua Italy
22. Fujita Health University, Otolaryngology; 1-98 Denngakugakubo, Kutukake-cho; Toyoake city Aichi Prefecture Japan
23. London Allergy and Immunology Centre; London UK
24. Department of Prevention of Envinronmental Hazards and Allergology; Medical University of Warsaw; Poland
25. Department of General Otorhinolaryngology, Head and Neck Surgery; Medical University of Graz; Graz Austria
26. Faculty of Medicine; University of Latvia; Riga Latvia
27. Department of Otorhinolaryngology; Düsseldorf University Hospital (UKD); Düsseldorf Germany
28. Kharkiv National Medical University; Kharkiv Ukraine
29. Department of Otolaryngology Head and Neck Surgery; Beijing TongRen Hospital; Capital Medical University; Beijing China