1. Division of Allergy University Clinic of Respiratory and Allergic Diseases Golnik Golnik Slovenia
2. Faculty of Medicine University of Maribor Maribor Slovenia
3. Faculty of Medicine University of Ljubljana Ljubljana Slovenia
4. Ambulatorio di Allergologia Clinica San Carlo Paderno Dugnano (Milano) Italy
5. Urticaria Center of Reference and Excellence (UCARE), Institute of Allergology, Charité Universitätsmedizin Berlin, Freie Universität Berlin Humboldt‐Universität zu Berlin Berlin Germany
6. Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Immunology and Allergology Berlin Germany
7. Department of Dermatology Koç University School of Medicine Istanbul Turkey
8. Dermatology Department, Hospital del Mar Research Institute Universitat Pompeu Fabra (UPF) Barcelona Spain