1. Department of Allergy, La Paz University Hospital, IdiPAZ, Spain
2. Allergy Unit, Department of Pulmonology, CHU de Montpellier, Montpellier, France
3. IDESP, UMR Inserm, Université de Montpellier, Montpellier, France
4. Division of Allergy and Clinical Immunology, Department of Medicine, McGill University Health Centre (MUHC), Montreal, QC, Canada
5. Allergy & Severe Asthma Service, St Bartholomew’s Hospital, Barts Health NHS Trust, London, UK
6. Drug Desensitisation Centre, Catalan Institute of Oncology/Bellvitge University Hospital, Barcelona, Spain
7. Department of Pediatric Allergy, Hacettepe, University Faculty of Medicine, Ankara, Turkey
8. WHO Collaborating Centre on Scientific Classification Support, Montpellier, France
9. Department of Biomedicine, Azienda Ospedaliera Universitaria Careggi, Florence, Italy
10. Allergy Unit, Department of Pediatrics, Meyer Children’s University Hospital, Florence, Italy