1. Bispebjerg University Hospital; Copenhagen Denmark
2. Department of Dermatology, Venereology and Allergology; University of Leipzig; Leipzig Germany
3. Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin; Humboldt-Universität zu Berlin; Berlin Germany
4. Berlin Institute of Health, Department of Dermatology, Venereology and Allergy; Division of Evidence-Based Medicine (dEBM); Berlin Germany