1. University of Medicine Tirana Tirana Albania
2. Allergy and Asthma Medical Clinic Tirana Albania
3. Allergy Department 2nd Pediatric Clinic University of Athens Athens Greece
4. Department of Allergy and Clinical Immunology 424 General Military Training Hospital Thessaloniki Greece
5. University Hospital Center “Mother Teresa” Tirana Albania
6. Internal Medicine Department Elbasan Regional Hospital Elbasan Albania
7. Medical University‐Sofia Faculty of Public Health Sofia Bulgaria
8. Acibadem City Clinic Tokuda Hospital Sofia Bulgaria
9. Immunotherapy Outpatient Clinic Allergy Unit 2nd Department Dermatology and Venereology National and Kapodistrian University of Athens University General Hospital ‘Attikon’ Athens Greece
10. Special Hospital for Pulmonary Diseases Zagreb Croatia
11. Clinical Department for Lung Diseases Jordanovec University Hospital Center Zagreb Croatia
12. University Medicine and Pharmacy Iuliu Hatieganu, IRGH, Allergy Cluj‐Napoca Romania
13. Expertise Centre for Immunology & WAO Centre of Excellence Cluj‐Napoca Romania
14. Clinic of Allergology and Immunology University Clinical Center of Serbia Belgrade Serbia
15. Faculty of Medicine University of Belgrade Belgrade Serbia
16. Department of Allergy and Immunology Ankara University School of Medicine Ankara Turkey
17. University Clinic of Respiratory and Allergic Diseases Golnik Slovenia
18. University Hospital “Sv Ivan Rilski” Sofia Bulgaria
19. Lydia Becker Institute of Immunology and Inflammation University of Manchester Manchester UK
20. Section of Allergy and Clinical Immunology Imperial College London‐NHLI London UK