1. Department of Dermatology, Skin Cancer Center, University Hospital Schleswig-Holstein (UKSH), Campus Kiel, Kiel, Germany
2. Institute for Health Services Research in Dermatology and Nursing (IVDP), University Medical Center Hamburg, Hamburg, Germany
3. Department of Dermatology, Eberhard-Karls University of Tübingen, Tübingen, Germany
4. Department of Dermatology, Skin Cancer Center Hannover, Hannover Medical School, Hannover, Germany
5. Department of Dermatology, University Hospital Erlangen, Erlangen, Germany
6. Department of Dermatology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
7. Department of Dermatology, University of Mainz, Mainz, Germany
8. Department of Dermatology, Venereology and Allergology, University Medical Center Mannheim, Mannheim, Germany