1. Department of Dermatology, Venereology, and Allergology; University Medical Center; Göttingen Germany
2. Department of Dermatology, Venereology, and Allergology; University Medical Center; Rostock Germany
3. Department of Dermatology; University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nuremberg; Germany
4. Department of Dermatology, Venereology, and Allergology; Medical Center Hildesheim GmbH; Hildesheim Germany
5. Institute of Genetic Epidemiology; University Medical Center; Göttingen Germany
6. Department of Dermatology, Venereology, and Allergology; University Medical Center; Heidelberg Germany