1. Department of Dermatology, Venereology and Allergology Skin Cancer Center Ruhr‐University St Josef Hospital Ruhr‐University Bochum Bochum Germany
2. Department of Dermatology Translational Skin Cancer Research German Cancer Consortium (DKTK) Partner Site Essen/Düsseldorf University Duisburg‐Essen Essen Germany
3. Deutsches Krebsforschungszentrum (DKFZ) Heidelberg Germany
4. Department of Dermatology University Hospital Essen University Duisburg‐Essen Essen Germany