1 Department of Dermatology and Venereology, University Hospital of Zürich, 8091 Zürich, Switzerland; Faculty of Medicine, University of Zürich, Zürich, Switzerland. Electronic address: julia-tatjana.maul@usz.ch.
2 Department of Dermatology and Venereology, University Hospital of Zürich, 8091 Zürich, Switzerland.
3 Department of Dermatology, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark; Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark.
4 Department of Dermatology, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark.