1. Department of Dermatology; Zealand University Hospital; Roskilde Denmark
2. Faculty of Health and Medical Sciences; University of Copenhagen; Copenhagen Denmark
3. Department of Dermatology; University of Modena and Reggio Emilia; Modena Italy
4. Musculoskeletal Statistics Unit; The Parker Institute; Bispebjerg and Frederiksberg Hospital; Frederiksberg Copenhagen Denmark
5. Department of Dermatology and Allergology; General Hospital Augsburg; Augsburg Germany
6. Department of Pathology; Zealand University Hospital; Roskilde Denmark
7. CMB/Collegium Medicum Berlin; Berlin Germany