1. Urticaria Center of Reference and Excellence (UCARE), Institute of Allergology, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt‐Universität zu Berlin Berlin Germany
2. Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Immunology and Allergology Berlin Germany
3. School of Medicine, Lebanese American University Byblos Lebanon
4. Institut National de Santé Publique d'Épidémiologie Clinique et de Toxicologie‐Liban (INSPECT‐LB) Beirut Lebanon
5. Department of Primary Care and Population Health University of Nicosia Medical School Nicosia Cyprus