1. Department of Dermatology, Christian Hospital Unna, Unna
2. Skin Cancer Center, Department of Dermatology, Ruhr-University Bochum, Bochum
3. Department of Dermatology, Klinikum Dortmund gGmbH, Dortmund
4. Translational Skin Cancer Research, DKTK Partner Site Essen/Düsseldorf, West German Cancer Center, Dermatology, University Duisburg-Essen, Essen
5. German Cancer Research Center (DKFZ), Heidelberg, Germany