1. Department of Immunology and Microbiology, University of Copenhagen, Copenhagen, Denmark
2. Division of Dermatology, McGill University Health Centre, Montréal, Quebec, Canada
3. Department of Molecular Medicine, Copenhagen University Hospital (Rigshospitalet), Copenhagen, Denmark
4. Department of Dermatology, Aarhus University Hospital, Skejby, Aarhus, Denmark
5. Department of Dermatology, Copenhagen University Hospital, Bispebjerg, Copenhagen, Denmark
6. Faculty of Medicine and Health Science, School of Veterinary Medicine and Science, University of Nottingham, Loughborough, United Kingdom
7. Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA