1. The Evidence Centre; London UK
2. Hans Christian Andersen Children's Hospital; Odense University Hospital; Odense Denmark
3. Primary Care Research & Development; Centre for Population Health Sciences; The University of Edinburgh; Edinburgh UK
4. Department of Pediatrics; Center for Food Allergy Diagnosis and Treatment; University of Padua; Padua Italy
5. Hanover Medical School; Hanover Germany
6. Department of Pathophysiology and Allergy Research; Medical University of Vienna; Vienna Austria
7. David Hide Asthma and Allergy Research Centre; St Mary's Hospital; Isle of Wight UK
8. NIHR Southampton Respiratory Biomedical Research Unit; University of Southampton and University Hospital Southampton NHS Foundation Trust; Southampton UK
9. Human Development and Health Academic Unit; Faculty of Medicine; University of Southampton; Southampton UK
10. Hospital Vall d'Hebron; Barcelona Spain
11. Division of Paediatric Pulmonology and Paediatric Allergy; Department of Paediatrics; University Medical; Centre Groningen; University of Groningen; RB Groningen the Netherlands
12. Allergy Clinic; Laboratory of Medical Allergology; Copenhagen University Hospital; Hellerup Denmark
13. Departments of Experimental Immunology and of Otorhinolaryngology; Academic Medical Center; University of Amsterdam; Amsterdam the Netherlands
14. Department of Pediatric Respiratory Medicine and Allergy; Emma Children's Hospital; Academic Medical Center; Amsterdam the Netherlands
15. Transylvania University; Brasov Romania
16. Swiss Institute of Allergy and Asthma Research; University of Zurich; Davos Platz Switzerland
17. School of Health Sciences and Social Work; University of Portsmouth; Portsmouth UK
18. Division of General Internal Medicine and Primary Care; Brigham and Women's Hospital/Harvard Medical School; Boston MA USA