1. Department of International Health, Immunology and Microbiology, University of Copenhagen, Copenhagen, Denmark;
2. Department of Dermatology, Aarhus University Hospital, Aarhus, Denmark;
3. Department of Pathology, New York University School of Medicine, New York, NY;
4. Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA;
5. Department of Dermatology, Bispebjerg Hospital, Copenhagen, Denmark; and
6. Department of Biomedicine, Aarhus University, Aarhus, Denmark