1. Asthma Center and Allergy Unit Verona University Hospital Verona Italy
2. Department of Medicine University of Verona Verona Italy
3. Servicio de Enfermedades del Sistema Inmune‐Alergia Hospital Universitario Príncipe de Asturias Madrid Spain
4. Airways Disease Section National Heart and Lung Institute (NHLI) Royal Brompton Hospital Imperial College London London UK
5. Children's Hospital of Wisconsin‐Milwaukee Campus Milwaukee WI USA
6. Allergy and Immunology UCLA Medical Center Los Angeles CA USA
7. Allergy UnitHospital & Instituto CUF Porto Porto Portugal
8. Department of Dermatology and Venereology Trakia University Stara Zagora Bulgaria
9. SOC Allergologia e Immunologica Clinica Azienda USL Toscana Centro Nuovo Ospedale S. Giovanni di Dio Florence Italy
10. Division of Asthma, Allergy, and Pediatric Pulmonology Boys Town National Research Hospital Omaha NE USA
11. Department of Pediatrics Washington University School of Medicine St. Louis MO USA
12. Department of Pediatric Allergy School of Life Course Sciences King's College London & Guy's and St Thomas’ Hospital NHS Foundation Trust London UK
13. Division of Asthma, Allergy and Lung Biology King's College London London UK
14. Hospital Sírio Libanês and Post‐graduation Program in Health Sciences of IAMSPE São Paulo São Paulo Brazil
15. University Hospital of Montpellier, Montpellier and Sorbonne Universités Paris France