1 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, Allergology and Immunology, Berlin, Germany 3 Espiritu Santo University, Samborondón 0901-952, Ecuador 4 Global Allergy and Asthma European Network (GA²LEN e.V.), Berlin, Germany 5 Urticaria Centers of Reference and Excellence (UCARE), Berlin, Germany 6 Angioedema Centers of Reference and Excellence (ACARE), Berlin, Germany