2 Department of Dermatology, National Reference Center for Rare Skin Disorders, CNRS, UMR5164, ImmunoConCept, University of Bordeaux, Bordeaux, France.
3 Department of Autoimmune Diseases, Hospital Clinic, Universitat de Barcelona, Barcelona, Catalonia,Spain.
4 Department of Dermatology, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark.