1. Department of Pediatric Pulmonology and Pediatric Allergy; University of Groningen; University Medical Centre Groningen; Groningen the Netherlands
2. University of Groningen; University Medical Centre Groningen; GRIAC Research Institute; Groningen the Netherlands
3. Department of General Practice; University of Groningen; University Medical Centre Groningen; Groningen the Netherlands
4. Department of Paediatric Allergy; Martini Hospital; Utrecht the Netherlands
5. Department of Dermatology/Allergology; University Medical Center Utrecht; Utrecht the Netherlands
6. Department of Immunology, Rheumatology and Allergy; Medical University of Lodz; Lodz Poland
7. Faculty of Economics and Sociology; Lodz University; Lodz Poland
8. Department of Allergy; University Hospital Ramón y Cajal; IRICYS; Madrid Spain
9. Department of Allergy; Hospital Clinico San Carlos; IdISSC; Madrid Spain
10. Department of Preventive Medicine; Research Unit; Hospital Clínico San Carlos; IdISSC; Madrid Spain
11. Ambulatorio di Allergologia; Clinica San Carlo; Paderno Dugnano Italy
12. Department of Allergy; Landspitali; University Hospital; Reykjavík Iceland
13. Department of Paediatrics and Child Health; Clinical Investigation Unit; Cork University Hospital; University College; Cork Ireland
14. Division of Allergy; Department of Chest Diseases; University Hospitals; University of Strasbourg; Strasbourg France
15. Allergy Department; 2nd Pediatric Clinic; University of Athens; Athens Greece
16. Center for Pediatrics and Child Health; Institute of Human Development; University of Manchester; Manchester UK
17. Food Safety and Consumer Behaviour; Marketing and Consumer Behaviour Group; Wageningen the Netherlands
18. Food and Society Group; School of Agriculture; Food and Rural Development; Newcastle University; Newcastle UK
19. Department of Respiratory Epidemiology and Public Health; National Heart and Lung Institute; Imperial College London; London UK