1. Skin Cancer Center, Department of Dermatology and National Center for Tumor Diseases (NCT), University Hospital Heidelberg, 69120 Heidelberg, Germany
2. Department of Dermatology, University Hospital Essen, 45147 Essen, Germany
3. German Cancer Consortium (DKTK), Partner Site Essen, 69120 Heidelberg, Germany
4. Bristol-Myers Squibb GmbH & Co. KGaA, 80636 Munich, Germany
5. Department of Dermatology, Venereology and Allergology, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 10117 Berlin, Germany
6. Department of Dermatology, Skin Cancer Center at the University Cancer Centre and National Center for Tumor Diseases, Faculty of Medicine and University Hospital Carl Gustav Carus, Technical University Dresden, 01062 Dresden, Germany
7. Department of Dermatology, Elbe-Kliniken, 21614 Buxtehude, Germany
8. Department of Internal Medicine III, Hematology and Oncology, University Hospital Regensburg, 93053 Regensburg, Germany
9. Bavarian Cancer Research Center (BZKF), 93053 Regensburg, Germany
10. Department for Radiation Oncology, Martin-Luther University Halle-Wittenberg, 06108 Halle, Germany
11. Department of Radiology, University Hospital Regensburg, 93053 Regensburg, Germany
12. Department of Dermatology, Johannes Wesling Medical Center, Ruhr University Bochum, 32429 Minden, Germany