1. Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, D-04103 Leipzig, Germany
2. Department of Dermatology, University Hospital, West German Cancer Center, University Duisburg-Essen, and German Consortium for Translational Cancer Research (DKTK), D-45147 Essen, Germany
3. Department for Translational Skin Cancer Research, University Duisburg-Essen, and German Consortium for Translational Cancer Research (DKTK), D-45141 Essen, Germany
4. Departments of Surgery and Pathology, Technical University Dresden, D-01307 Dresden, Germany