1. Department of Dermatology, Venereology and Allergology University Medical Centre Mannheim Mannheim Germany
2. Section for Clinical and Experimental Dermatology, Medical Faculty Mannheim University of Heidelberg Mannheim Germany
3. Skin Cancer Unit, German Cancer Research Centre (DKFZ) Heidelberg Germany
4. Department for Medical Statistics, Biomathematics and Information Processing Medical Faculty Mannheim of the University of Heidelberg and University Medical Centre Mannheim Mannheim Germany
5. Department of Dermatology Ludwigshafen Medical Centre Ludwigshafen Germany
6. University Clinic for Dermatology, Johannes Wesling Medical Centre Minden Germany
7. Department of Dermatology Medical University of Vienna Vienna Austria
8. Department of Dermatology and Skin Cancer Centre, Municipal Hospital Karlsruhe Academic Educational Hospital of the University of Freiburg Karlsruhe Germany
9. Department of Dermatology University Hospital Essen Essen Germany
10. Department of Dermatology, Venereology and Allergology University Medical Centre Göttingen Göttingen Germany
11. Department of Dermatology University Hospital Würzburg Würzburg Germany
12. Department of Dermatology Bochum Medical Centre Bochum Germany
13. Department of Dermatology Dortmund Medical Centre Dortmund Germany
14. Department of Dermatology University Medical Centre Leipzig Germany