1. Allergy Unit, Department of Clinical and Molecular Sciences Università Politecnica delle Marche Ancona Italy
2. Allergy and Clinical Immunology School Università Politecnica delle Marche Ancona Italy
3. General Medicine, Immunology and Allergy Unit ‐ IRCCS Foudation Ca’ Granda Ospedale Maggiore Policlinico Milan Italy
4. UOC Allergologia Ospedale Policlinico San Martino Genova Italy
5. U.S.D. Allergology Integrated University‐Hospital of Verona Verona Italy
6. Allergy Unit, Internal Medicine Department, Rimini Hospital Local Health Unit of Romagna Rimini Italy
7. Department of Internal Diseases and Allergology Medical University of Wroclaw Wroclaw Poland
8. Allergy Unit, Hospital S. Giovanni di Dio Florence Italy
9. UOS Allergology ASST Lariana Sant'Anna Hospital Como Italy
10. Division Allergy and Clinical Immunology, Department of Medicine ASL Salerno "Santa Maria della Speranza" Hospital Salerno Italy
11. A.O.U San Giovanni di Dio e Ruggi d'Aragona Salerno Italy
12. High Specialization Unit of Allergology, Hospital of Faenza AUSL (Local Health Unit) of Romagna Faenza Italy
13. SOC Pneumologia‐Fisiopatologia Respiratoria, Azienda Sanitaria Universitaria Integrata di Udine Udine Italy
14. Allergologia e Immunologia Clinica, Dipartimento di Medicina e Chirurgia Università degli studi di Parma Parma Italy
15. London Allergy and Immunology Centre London UK