1. Skin Cancer Unit, German Cancer Research Center (DKFZ), Heidelberg, Germany
2. Department of Dermatology, Venereology and Allergology, University Medical Center Mannheim, Ruprecht-Karl University of Heidelberg, Mannheim, Germany
3. Naval Health Clinic Hawaii, Pearl Harbor, HI, USA
4. Dermatology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA