1. From the Departments of Dermatology and Pathology,University of Graz, Austria; the Department of Dermatology, University of Münster; the Department of Dermatology, University of Munich; the Department of Dermatology, University of Würzburg; and Dermatopathologisches Gemeinschaftslabor, Friedrichshafen, Germany; and the Department of Dermatology, Yale University, New Haven, CT.