1. Evidence-Based Health Care Ltd; Edinburgh UK
2. Department of Hygiene and Epidemiology; University of Ioannina School of Medicine; Ioannina Greece
3. Centre for Environmental and Preventive Medicine; Wolfson Institute of Preventive Medicine Barts and the London School of Medicine and Dentistry; Queen Mary University of London; London UK
4. Faculty of Medicine; Department of Allergy and Clinical Immunology; Transylvania University Brasov; Brasov Romania
5. Department of Pediatric Pneumology and Immunology; Charité Universitätsmedizin; Berlin Germany
6. Wroclaw Medical University; Wroclaw Poland
7. ALL-MED Medical Research Institute; Wroclaw Poland
8. Food Allergy Referral Centre Veneto Region; University Hospital of Padua; Padua Italy
9. The David Hide Asthma and Allergy Research Centre; St Mary's Hospital; Newport UK
10. NIHR Biomedical Research Centre; University Hospital Southampton NHS Foundation Trust; Southampton UK
11. Faculty of Medicine; University of Southampton; Southampton UK
12. Swiss Institute for Allergy and Asthma Research; Christine Kühne-Center for Allergy Research and Education (CK-CARE); Davos Switzerland
13. National Heart and Lung Institute; Imperial College London; London UK
14. Department of Allergy and Clinical Immunology; Sami Ulus Women's & Children's Diseases Training and Research Hospital; Ankara Turkey
15. Department of Pediatric Allergy and Immunology; Ulus Women's & Children's Diseases Training and Research Hospital; Ankara Turkey
16. European Federation of Allergy and Airways Diseases Patients Association; Brussels Belgium
17. Saga Medical School; Nabeshima Japan
18. Hacettepe University; Ankara Turkey
19. Institute of Medical Statistics, Informatics and Epidemiology (IMSIE); University of Cologne; Köln Germany
20. Department of Biochemistry and Molecular Biology; Complutense University of Madrid; Madrid Spain
21. Department of Otorhinolaryngology, Head and Neck Surgery; Universitätsmedizin Mannheim; Medical Faculty Mannheim; Heidelberg University; Mannheim Germany
22. Center for Rhinology and Allergology; Wiesbaden Germany
23. Centre for Health Economics; University of York; York UK
24. Institute for Health and Human Development; University of East London; London UK
25. Bradford School of Pharmacy; Bradford UK
26. Health and Hospital Management; Institute of Business Management; Karachi Pakistan
27. Asthma UK Centre for Applied Research; The University of Edinburgh; Edinburgh UK