1. Department of Dermatology, University Hospital of Zürich, 8091 Zürich, Switzerland
2. The Wistar Institute, University of Pennsylvania, Philadelphia, PA, USA
3. Skin Cancer Unit of the German Cancer Research Center, University Hospital Mannheim, Mannheim, Germany
4. Division of Molecular Genetic Epidemiology, German Cancer Research Center, Heidelberg, Germany
5. Abramson Family Cancer Research Insitute, University of Pennsylvania Cancer Center, Philadelphia PA, USA
6. Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA, USA
7. Monash Institute of Medical Research, Monash University, Clayton, Victoria, Australia