1. Department of Dermatology, University Hospital of Schleswig-Holstein, Kiel, Germany
2. Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, Leeds, United Kingdom
3. Department of Paediatric Pathology, University Hospital of Schleswig-Holstein, Kiel, Germany
4. Department of Medical Informatics and Statistics, University Hospital of Schleswig-Holstein, Kiel, Germany