1. Department of Dermatology, Venereology and Allergology, Ruhr-University Bochum, 44791 Bochum, Germany
2. Department of General and Visceral Surgery, St. Josef-Hospital, Ruhr-University Bochum, 44791 Bochum, Germany
3. Geistlich Pharma AG, 6110 Wolhusen, Switzerland
4. Department of Translational Skin Cancer Research, Dermatology, University Hospital Essen, 45147 Essen, Germany
5. German Cancer Consortium (DKTK), Partner Site Essen and the German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany