1 Department of Dermatology, Ruhr-University Bochum, Bochum, Germany.
2 Department of Dermatology, Christian Hospital Unna, Unna, Germany.
3 Department of Dermatology, Dortmund Hospital gGmbH and Faculty of Health, University of Witten/Herdecke, Dortmund, 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.