1. Department of Dermatology and Allergy; Charité-Universitätsmedizin Berlin; Berlin Germany
2. Department of Allergy and Immunology; Hospital Quironsalud Bizkaia; Bilbao Spain
3. Center for Children and Adolescents; University Hospital Frankfurt; Frankfurt Germany
4. Division of Clinical Immunology and Allergy; St. Michael's Hospital; University of Toronto; Toronto ON Canada
5. Department of Dermatology; Johannes Gutenberg University Mainz; Mainz Germany
6. Department of Medicine and Pediatrics; University of Calgary; Calgary AB Canada
7. HAEi; Lausanne Switzerland
8. Hungarian Angioedema Center; 3rd Department of Internal Medicine; Semmelweis University; Budapest Hungary
9. Clinical Immunology; Faculdade de Medicina ABC; São Paulo Brazil
10. Department of Dermatology; Hiroshima University; Hiroshima Japan
11. Department of Medicine; Campbelltown Hospital and Western Sydney University; Sydney NSW Australia
12. Department of Internal Medicine; University of South Florida Morsani College of Medicine; Tampa FL USA
13. Department of Clinical Biochemistry and Immunology; Addenbrooke's Hospital; Cambridge University Hospitals NHS Foundation Trust; UK
14. Department of Internal Medicine; Allergy/Immunology Division; Southwestern Medical School; University of Texas; Dallas TX USA
15. Hemophilia Centre Rhine Main; Moerfelden-Walldorf Germany
16. University of Medicine and Pharmacy; Tîrgu Mures Romania
17. Berlin Institute of Health; Department of Dermatology, Venereology und Allergy; Division of Evidence based Medicine (dEBM); Corporate Member of Freie Universität Berlin; Humboldt-Universität zu Berlin; Charité-Universitätsmedizin Berlin; Berlin Germany
18. Department of Pediatrics; Nippon Medical School; Tokyo Japan
19. Department of Medicine; University of Cape Town; Cape Town South Africa
20. Department of Medicine; University of California-San Diego; La Jolla CA USA
21. Division of Hematology; University of Alberta; Edmonton AB Canada
22. Allergy and Immunology Department; University of Missouri at Kansas City School of Medicine; Kansas City MO USA
23. Allergy and Clinical Immunology Department; Centro Medico Docente La Trinidad; Caracas Venezuela
24. Department of Allergy; Peking Union Medical College Hospital and Chinese Academy of Medical Sciences; Beijing China
25. San Diego VA Healthcare; San Diego CA USA
26. Department of Medicine and Pediatrics; Penn State University; Hershey PA USA