1. Department of Dermatology University Hospital of EssenUniversity Duisburg‐Essen and German Cancer Consortium (DKTK) partner site Essen/Düsseldorf Essen Germany
2. Institute for Developmental Cancer Therapeutics & Division of Solid Tumor Translational Oncology (DKTK/DKFZ partner site Essen) West German Cancer Center University Hospital of Essen Essen Germany
3. German Cancer Consortium and German Cancer Research Center (DKFZ) Heidelberg Germany
4. Department of Dermatology University Medical Center Tübingen Tübingen Germany
5. Department of Medical Oncology Universitair Ziekenhuis BrusselVrije Universiteit Brussel Brussel Belgium
6. Department of Translational Skin Cancer Research (TSCR) University Hospital of EssenUniversity of Duisburg‐Essen and German Cancer Consortium (DKTK) partner site Essen/Düsseldorf Essen Germany
7. Institute for Transfusion Medicine University Hospital of Essen Essen Germany