1. Division of Allergy Urticaria Center of Reference and Excellence (UCARE)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. Department of Dermatology Urticaria Center of Reference and Excellence (UCARE)Bispebjerg HospitalUniversity of Copenhagen Copenhagen Denmark
5. Urticaria Center of Reference and Excellence (UCARE)Center of Allergy and ImmunologyClinical State Hospital 52Moscow Ministry of Healthcare Moscow Russian Federation
6. Department of Clinical Immunology and Allergology I.M. Sechenov First Moscow State Medical University Moscow Russian Federation
7. Department of Dermatology and Venereology I.M. Sechenov First Moscow State Medical University Moscow Russian Federation
8. Department of Clinical Genetics Veltischev Research and Clinical Institute for Pediatrics of the Pirogov Russian National Research Medical University Moscow Russian Federation
9. Department of Dermatology Urticaria Center of Reference and Excellence (UCARE)Faculty of Medicine Siriraj HospitalMahidol University Bangkok Thailand
10. Department of Clinical Immunology and Allergology Urticaria Center of Reference and Excellence (UCARE)Smolensk State Medical University Smolensk Russian Federation
11. Urticaria Center of Reference and Excellence (UCARE) Institute for Allergology Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt‐Universität zu BerlinBerlin Germany
12. Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Allergology and Immunology Berlin Germany
13. Microbiology Department Faculty of Medicine Urticaria Center of Reference and Excellence (UCARE)Kuwait University Safat Kuwait
14. Department of Dermatology and Venerology Urticaria Center of Reference and Excellence (UCARE)Comprehensive Allergy CenterKepler University Hospital Linz Austria
15. Department of Dermatology Urticaria Center of Reference and Excellence (UCARE)University Allergy CenterUniversity Hospital Carl Gustav CarusTechnical University Dresden Germany
16. Immunoallergology Department Urticaria Center of Reference and Excellence (UCARE)Hospital de Santa MariaCHULN Lisbon Portugal
17. Division of Allergy Department of Internal Medicine Istanbul Faculty of Medicine Urticaria Center of Reference and Excellence (UCARE)Istanbul University Istanbul Turkey
18. Faculdade de Medicina do ABC (FMABC)Urticaria Center of Reference and Excellence (UCARE) Santo André Brazil
19. Division of Allergy, Clinical Immunology and Rheumatology Department of Pediatrics Urticaria Center of Reference and Excellence (UCARE)Federal University of São Paulo São Paulo Brazil
20. Department of Dermatology Urticaria Center of Reference and Excellence (UCARE)Hospital del MarIMIMUniversitat Autònoma Barcelona Spain
21. Clinic of Dermatology Urticaria Center of Reference and Excellence (UCARE)University Hospital and Faculty of MedicineUniversity of Coimbra Coimbra Portugal
22. Center of Allergy and ImmunologyUrticaria Center of Reference and Excellence (UCARE) Tbilsi Georgia
23. Department of Environmental Immuno‐Dermatology Urticaria Center of Reference and Excellence (UCARE)Yokohama City University Graduate School of Medicine Yokohama Japan
24. Clinical Department of Internal Diseases European Center for Diagnosis and Treatment of UrticariaUrticaria Center of Reference and Excellence (UCARE)Dermatology and Allergology of Medical University of Silesia Zabrze Poland
25. Allergy Research CenterMashhad University of Medical Sciences Mashhad Iran
26. Department of Clinical Immunology and Allergology Republican Center of Clinical Immunology and AllergologyUrticaria Center of Reference and Excellence (UCARE)Republican Clinical HospitalKazan State Medical University Kazan Russian Federation
27. Department of Fundamental Principles of Clinical Medicine Institute of Fundamental Medicine and Biology (IFMB) of Kazan Federal University Kazan Russian Federation
28. Department of Dermatology Urticaria Center of Reference and Excellence (UCARE)Koç University School of Medicine Istanbul Turkey
29. Department of Dermatology Urticaria Center of Reference and Excellence (UCARE)The Third Affiliated Hospital of Sun Yat‐sen University Guangzhou China
30. Allergy Unit Second Department of Dermatology and Venereology Urticaria Center of Reference and Excellence (UCARE)National and Kapodistrian University of AthensUniversity General Hospital “Attikon” Athens Greece
31. Division of Allergy and Clinical Immunology Department of Medicine Urticaria Center of Reference and Excellence (UCARE)University of Cape Town Cape Town South Africa
32. Allergy and Immunology Unit University of Cape Town Lung Institute Cape Town South Africa
33. Urticaria Center of Reference and Excellence (UCARE)Instituto de Alergia e Inmunologia del Sur Buenos Aires Argentina
34. Adults and Pediatrics Allergy Unit Urticaria Center of Reference and Excellence (UCARE)Hospital Italiano de Buenos Aires Buenos Aires Argentina
35. Department of Internal Medicine, Immunology Service Urticaria Center of Reference and Excellence (UCARE)Federal University of Rio de Janeiro Rio de Janeiro Brazil
36. Urticaria Center of Reference and Excellence (UCARE)London Allergy and Immunology Centre London UK
37. Faculdade de Ciências Médicas e da Saúde de Juiz de Fora (SUPREMA)Urticaria Center of Reference and Excellence (UCARE)Hospital Maternidade Therezinha de Jesus Minas Gerais Brazil
38. Department of Dermatology Urticaria Center of Reference and Excellence (UCARE)University Hospital of ErlangenUniversity of Erlangen‐Nuremberg (FAU) Germany
39. Allergy Unit 2nd Pediatric Clinic Urticaria Center of Reference and Excellence (UCARE)National and Kapodistrian University of Athens Greece
40. Department of General Practice Urticaria Center of Reference and Excellence (UCARE)Community Health Service Center Guangzhou City China
41. Department of Dermatology and Venerology Urticaria Center of Reference and Excellence (UCARE)Beijing Key Laboratory of Molecular Diagnosis on Dermatoses and National Clinical Research Center for Skin and Immune DiseasesPeking University First Hospital Beijing China