[1] Charite Univ Med Berlin, Inst Allergol, Berlin, Germany
[2] Free Univ Berlin, Berlin, Germany
[3] Humboldt Univ, Berlin, Germany
[4] Fraunhofer Inst Translat Med & Pharmacol ITMP, Allergol & Immunol, Berlin, Germany
[5] Assoc Portuguesa Doentes Urticaria, Oeiras, Portugal
[6] Univ Laval, CHU Quebec, Quebec City, PQ, Canada
[7] Canadian Chron Urticaria Soc, Quebec City, PQ, Canada
[8] Univ Pompeu Fabra, Hosp Mar, Res Inst, Barcelona, Spain
[9] Fortis Hiranandani Hosp, Mumbai, India
[10] FUNDAPSO, Cali, Colombia
[11] Univ British Columbia, Vancouver, BC, Canada
[12] Dalhousie Univ, Halifax, NS, Canada
[13] Novartis Pharmaceut, E Hanover, NJ USA
[14] McGill Univ, Montreal Gen Hosp, Montreal, PQ, Canada
[15] Global Allergy & Airways Patient Platform, Vienna, Austria