1. Evidence-Based Health Care Ltd; Edinburgh UK
2. School of Pharmacy; University of Bradford; Bradford UK
3. Department of Pediatric and Adolescent Medicine; Respiratory and Allergic Disease Division; Medical University of Graz; Graz Austria
4. Department of Dermatology and Venerology; Medical University of Graz; Graz Austria
5. Outpatient Allergy Clinic Reumannplatz; Vienna Austria
6. Department of Women and Child Health; Food Allergy Referral Centre Veneto Region; Padua General University Hospital; Padua Italy
7. Swiss Institute of Allergy and Asthma Research (SIAF); Switzerland Servicio de Enfermedades del Sistema Inmune-Alergia; University of Zurich; Zurich Switzerland
8. Departamento de Medicina y Especialidades Médicas; Hospital Universitario Príncipe de Asturias; Madrid Spain
9. Universidad de Alcalá; Madrid Spain
10. Allergy Unit; Department of Internal Medicine; University Hospital of Ancona; Ancona Italy
11. Section of Allergy and Clinical Immunology; Imperial College London; National Heart and Lung Institute; Royal Brompton Hospital; London UK
12. Department of Pediatrics; Jagiellonian University Medical College; Krakow Poland
13. Department of Allergology and Internal Medicine; University of Groningen; University Medical Hospital Groningen; Groningen The Netherlands
14. Groningen Research Center for Asthma and COPD (GRIAC); Groningen The Netherlands
15. Department of Internal Medicine, Allergy and Clinical Immunology; Medical University of Silesia; Katowice Poland
16. Department of Dermatology and Allergology; University Medical Center Gießen and Marburg (UKGM); Justus Liebig University Gießen; Gießen Germany
17. Medical Faculty Ljubljana; University Clinic of Respiratory and Allergic Diseases Golnik; Golnik Slovenia
18. Department of Pediatric Pneumonology and Allergy; Medical University of Warsaw; Warsaw Poland
19. Department of Allergology and Clinical Immunology; Mother Theresa School of Medicine; Tirana Albania
20. Department of Paraclinical Disciplines; Faculty of Technical Medical Sciences; Medicine University of Tirana; Tirana Albania
21. Department of Allergy and Clinical Immunology; 2nd Pediatric Clinic; University of Athens; Athens Greece
22. Allergy Clinic; Copenhagen University Hospital Gentofte; Gentofte Denmark
23. Department of Infection and Immunity; Luxembourg Institute of Health (LIH); Strassen Luxembourg
24. Department of Otorhinolaryngology; Head and Neck Surgery; Universitätsmedizin Mannheim; Mannheim Germany
25. Medical Faculty Mannheim; Heidelberg University; Heidelberg Germany
26. Center for Rhinology Allergology; Wiesbaden Germany
27. Medical School; University of Cyprus; Nicosia Cyprus
28. UOC Clinical Allergy and Immunology; IRCCS Foundation Ca’ Granda Ospedale Maggiore Policlinico; Milan Italy
29. The David Hide Asthma and Allergy Research Centre; St Mary's Hospital; Newport Isle of Wight UK
30. NIHR Respiratory Biomedical Research Unit; University Hospital Southampton NHS Foundation Trust; Southampton UK
31. Faculty of Medicine; University of Southampton; Southampton UK
32. Klinik und Poliklinik für Dermatologie und Allergologie; Klinikum der Universität München; Munich Germany
33. Department of Pulmonary Diseases; Division of Immunology and Allergy; Faculty of Medicine; Ankara University; Ankara Turkey
34. Research Fellow Centre for Health Economics; University of York; UK
35. Institute for Health and Human Development; University of East London; London UK
36. Allergy and Respiratory Research Group; The University of Edinburgh; Edinburgh UK