1. Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute of Allergology, Berlin, Germany
2. Allergology and Immunology, Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Berlin, Germany
3. Department of Respiratory Medicine and General Medicine, Box Hill Hospital, Melbourne, Australia
4. Monash Lung, Sleep and Allergy/Immunology, Monash Medical Centre, Melbourne, Australia
5. Eastern Health Clinical School, Monash University, Melbourne, Australia
6. Department of Dermatology, College of Medicine and Sagore Dutta Hospital, Kolkata, India
7. Urticaria Center of Reference and Excellence, Department of Dermatology, Kayseri City Education and Research Hospital, University of Health Sciences, Kayseri, Turkey
8. Department of Dermatology, Koç University School of Medicine, Istanbul, Turkey
9. Department of Dermatology, Bispebjerg Hospital, Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark