1. Department of Dermatology University Hospital Essen, University of Duisburg‐Essen Essen Germany
2. German Cancer Consortium (DKTK) Heidelberg Germany
3. Department of Pathology Memorial Sloan Kettering Cancer Center New York New York USA
4. Division of Cancer Epigenomics German Cancer Research Center (DKFZ) Heidelberg Germany
5. Helmholtz International Graduate School for Cancer Research Heidelberg Germany
6. Faculty of Biosciences Heidelberg University Heidelberg Germany
7. Dermatohistology Laboratory Lübeck Lübeck Germany
8. Dermatopathology Duisburg‐Essen Essen Germany
9. Dermatohistology am Stachus Munich Germany
10. Dermatopathology Friedrichshafen Friedrichshafen Germany
11. Department of Pathology University Hospital Essen, University of Duisburg‐Essen Essen Germany
12. Rudolf‐Schönheimer‐Institute of Biochemistry Medical Faculty of the University Leipzig Leipzig Germany