1. Skin Cancer Center Department of Dermatology Ruhr‐University Bochum Bochum Germany
2. Institute for Prevention and Occupational Medicine of the German Social Accident Insurances Ruhr‐University Bochum (IPA) Bochum Germany
3. Department of Anatomy and Molecular Embryology Medical Faculty Ruhr‐University Bochum Bochum Germany
4. Translational Skin Cancer Research DKTK Partner Site Essen/Düsseldorf West German Cancer Center Dermatology University Duisburg‐Essen Essen Germany
5. German Cancer Research Center (DKFZ) Heidelberg Germany