1. Department of Dermatology, Venereology and Allergology, University Hospital Frankfurt, Goethe University, Frankfurt, Germany
2. Department of Dermatology, University Medical Center, Tübingen, Germany
3. Department of Dermatology, Städtisches Klinikum Karlsruhe, Akademisches Lehrkrankenhaus der Universität Freiburg, Karlsruhe, Germany