1. Department of Dermatology Hospital Ludwigshafen Germany
2. Department of Dermatology and Venereology Helios Hospital Krefeld Germany
3. West German Tumor Center University Hospital Essen Germany
4. Department I of Internal Medicine University Hospital Cologne Germany
5. Department of Dermatology Venereology and Allergology Canton Hospital St. Gallen Switzerland
6. Department of Radiation Therapy and Radio‐Oncology University Hospital Münster Germany
7. German Cancer Society Berlin Germany
8. Department of Dermatology University Hospital Mainz Germany
9. Department of Dermatology University Hospital Essen Germany
10. Institute of Pathology University Hospital Schleswig‐Holstein Campus Kiel Germany
11. Department of Dermatology Municipal Hospital of Karlsruhe Academic Teaching Hospital for the University of Freiburg Karlsruhe Germany
12. Department of Dermatology and Venereology University Hospital Freiburg medical Faculty Albert‐Ludwigs University Freiburg Germany
13. Department of Dermatology Venereology and Allergology University Hospital Göttingen Germany
14. Department of Dermatology Venereology and Allergology University Hospital Schleswig‐Holstein Campus Kiel Germany
15. Department of Dermatology Dortmund Hospital GmbH Dortmund Germany
16. Department of Dermatology Venereology and Allergology University Hospital Mannheim Germany
17. Charité – Universitätsmedizin Berlin Department of Dermatology Venereology and Allergology Berlin Germany
18. Department of Dermatology Venereology and Allergology University Hospital at Ruhr University Bochum Germany
19. Department for Dermatology University Hospital Halle Germany
20. Rehabilitation Hospital Herzoghöhe Bayreuth Germany
21. Department of Nuclear Medicine Technical University of Munich Germany
22. Department of Dermatology Venereology and Allergology University Hospital Würzburg Germany
23. Department of Dermatology Venereology Allergology and Phlebology Johannes Wesling University Hospital Minden University Hospital at Ruhr University Bochum Germany