1. Dermatological Allergology Allergie‐Centrum‐Charité Department of Dermatology and Allergy Charité ‐ Universitätsmedizin Berlin Berlin Germany
2. Department of Dermatology, Hospital del Mar Autonomous University of Barcelona Barcelona Spain
3. St John's Institute of Dermatology London UK
4. Outpatient Clinic of Allergology San Carlo Hospital Paderno Dugnano Italy
5. Department of Dermatology and Allergology Tenon Hospital Paris France
6. University Clinic of Respiratory and Allergic Diseases Golnik Golnik Slovenia
7. Mercury Medical Research & Writing New York NY USA