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).