1. Department of Dermatology and Allergology Technical University of Munich Munich Germany
2. Allergy Clinic Department of Dermato‐Allergology Gentofte Hospital Copenhagen Denmark
3. Kings College London Guy's Hospital London UK
4. Department of Immunology and Allergology Faculty of Medicine in Pilsen Charles University Prague Czech Republic
5. Department of Dermatology/Allergology University Medical Center Utrecht Utrecht University Utrecht the Netherlands
6. Department of Lung Diseases and Clinical Allergology University of Turku and Allergy Clinic Terveystalo, Turku Finland