1. Angioedema Center of Reference and Excellence (ACARE) Institute of Allergology Charité – Universitätsmedizin, corporate member of Freie Universität Berlin and Humboldt‐Universität zu Berlin Berlin Germany
2. Allergology and Immunology Fraunhofer Institute for Translational Medicine and Pharmacology ITMP Berlin Germany
3. HAE Patient Wiesbaden Germany
4. Hungarian Angioedema Center of Reference and Excellence (ACARE) Department of Internal Medicine and Haematology Semmelweis University Budapest Hungary
5. HNO‐Praxis Schaffhausen Schaffhausen Switzerland