1. Department of Dermatology, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark
2. Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark
3. Department of Dermatology, University Hospital Basel, Basel, Switzerland
4. Department of Dermatology, University of Miami Miller School of Medicine, Miami, FL, USA
5. Faculty of Medicine, University of Zürich, Zürich, Switzerland
6. Department of Dermatology, University Hospital Zürich, Zürich, Switzerland
7. Department of Dermatology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
8. Division of Dermatology and Venereology, Geneva University Hospitals, Geneva, Switzerland
9. Department of Dermatology, CHUV University Hospital and University of Lausanne (UNIL), Lausanne, Switzerland
10. Department of Dermatology, Venereology and Allergy, Cantonal Hospital St. Gallen, St. Gallen, Switzerland
11. Department of Rheumatology, University Hospital Zürich, Zürich, Switzerland
12. The Parker Institute, Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark
13. Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark