J. Castagna ⁎ 
Dermatology and Allergy Department, Besançon University Hospital, Besançon, France
F. Tetart
Dermatology and Allergy Department, Rouen University Hospital, Rouen, France
A. Badaoui
Private Practice, 26 rue Laferrière, 75009 Paris, France
Dermatology Department, Hôpital d’instruction des armées Bégin, Saint-Mandé, France
E. Amsler
Sorbonne University, Dermatology and Allergy Department, Tenon Hospital, UCARE and ACARE Tenon Hospital center Paris, France
P. Pralong
Dermatology and Allergy Department, Grenoble University Hospital, Grenoble, France
F. Castelain
Dermatology and Allergy Department, Besançon University Hospital, Besançon, France
J. Delaunay
Dermatology and Allergy Department, Angers University Hospital, Angers, France
A. Soria
Sorbonne University, Dermatology and Allergy Department, Tenon Hospital, UCARE and ACARE Tenon Hospital center Paris, France
for theFrench urticaria group GUS