1. Department of Dermatology, Essen University Hospital, Germany and German Cancer Consortium Partner Site Essen/Düsseldorf, Essen, Germany
2. Department of Medicine, University of Washington Medical Center, Seattle, WA, USA
3. Department of Dermatology, University of Kiel, Kiel, Germany
4. Head of Service de Dermatologie Générale et Oncologique, University of Versailles-SQY, CHU A Paré, Boulogne Cedex, France
5. EMD Serono, Inc., Billerica, Boston, MA, USA
6. Pfizer Inc, New York, NY, USA
7. Department of Surgery and Medicine, Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA