Grup d'Investigació “Creixement i Desenvolupament”, Institut de Recerca de l'Hospital Universitari Vall d'Hebron (VHIR), Barcelona, Spain;4. Department of Dermatology and Allergy Centre, Odense Research Centre for Anaphylaxis (ORCA), Odense University Hospital, University of Southern Denmark, Odense, Denmark;5. Department of Paediatrics, Faculty of Medicine, Imperial College, London, UK;6. Primary Care and Public Health, Faculty of Medicine, University of Southampton, Southampton, UK;7. Department of Paediatric and Adolescent Medicine, Paediatric Pneumology, Allergology and Cystic Fibrosis, University Hospital Frankfurt, Frankfurt am Main, Germany;8. Section of Paediatrics, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy

Department of Clinical Immunology and Allergology, I.M. Sechenov First Moscow State Medical University, Moscow, Russia;9. Applied Psychology and Paediatrics and Child Health, University College Cork, Cork, Ireland;10. Claudia Gore: Paediatric Allergy, St Mary Hospital, London, UK;11. Department of Otorhinolaryngology, Head and Neck Surgery, University Hospitals Saint-Luc, Brussels, Belgium;12. Allergy Center, CUF Descobertas Hospital and CUF Infante Santo Hospital, Lisbon, Portugal;13. Department of Women and Children's Health (Paediatric Allergy, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, UK;14. Allergy Department, Hospital Infantil Universitario del Niño Jesús, Madrid, Spain;15. Allergy Action, St Albans, UK;16. Nederlands Anafylaxis Netwerk – European Anaphylaxis Taskforce, Dordrecht, The Netherlands