1. Department of Dermatology, Venereology and Allergology, University Medical Center Mannheim, University of Heidelberg, 68167 Mannheim, Germany
2. Skin Cancer Unit, German Cancer Research Center, 69120 Heidelberg, Germany
3. Section of Clinical and Experimental Dermatology, Medical Faculty Mannheim, University of Heidelberg, 68167 Mannheim, Germany
4. Department of Hematology and Oncology, University Hospital of Schleswig-Holstein, Campus Lübeck, 23538 Lübeck, Germany
5. Department of Dermatology and Venereology, University Skin Cancer Center Hamburg, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany
6. Department of Dermatology, Lausanne University Hospital (CHUV) and Faculty of Biology and Medicine, University of Lausanne, 1007 Lausanne, Switzerland
7. Department of Dermatology, Helios Hospital Krefeld, 47805 Krefeld, Germany
8. Institute for Molecular Medicine, Medical School Hamburg, 20457 Hamburg, Germany