1. Department of Dermatology; Ludwigshafen Medical Center; Ludwigshafen Germany
2. Department of Dermatology and Venereology; Helios Medical Center; Krefeld Germany
3. West German Tumor Center; University Medical Center; Essen Germany
4. Department of Internal Medicine I; University Medical Center; Cologne Germany
5. Department of Dermatology; Venereology and Allergology; Charité University Medicine; Berlin Germany
6. Department of Dermatology; Venereology and Allergology; Canton Hospital; St. Gallen Switzerland
7. Department of Radiation Oncology; University Medical Center; Münster Germany
8. German Cancer Society; Berlin Germany
9. Department of Dermatology; University Medicine; Mainz Germany
10. Department of Dermatology; University Medical Center; Essen Germany
11. Institute of Pathology; Schleswig-Holstein University Medical Center; Kiel Germany
12. Department of Dermatology; Karlsruhe Medical Center; Academic Teaching Hospital of the University of Freiburg; Karlsruhe Germany
13. Department of Dermatology and Venereology; University Medical Center; Freiburg Germany
14. Pallas Kliniken AG; Center for Dermatology; Winterthur Switzerland
15. Department of Dermatology; Dortmund Medical Center; Dortmund Germany
16. Department of Dermatology; Venereology and Allergology; University Medical Center; Mannheim Germany
17. Department of Dermatology and Venereology; University Medical Center; Cologne Germany
18. Rehabilitation and Follow-up Treatment Center; Herzoghöhe Bayreuth Germany
19. Department of Nuclear Medicine; University Medical Center rechts der Isar; Technical University of Munich; Germany
20. Department of Dermatology; Venereology and Allergology; Schleswig-Holstein University Hospital; Campus in Kiel Germany
21. Department of Dermatology; Venereology and Allergology; University Medical Center; Würzburg Germany
22. Department of Dermatology; Venereology; Allergology and Phlebology; Johannes Wesling Medical Center, Minden, Germany (University Hospital of Ruhr University; Bochum Germany)