1. Department of Dermatology University of Heidelberg Heidelberg Germany
2. Public, Private and Teaching Practice Konstanz Germany
3. Department of Dermatology and Allergology University Medical Center Göttingen Göttingen Germany
4. Department of Dermatology and Venerology Medical University of Graz Graz Austria
5. Department of Dermatology, Allergology and Environmental Medicine II Hospital Thalkirchner Street Munich Germany
6. Department of Genetic Epidemiology University Medical Center of Goettingen Goettingen Germany