1. Department of Dermatology; Johannes Gutenberg University; Mainz Germany
2. University Medicine; Ernst Moritz Arndt University; Greifswald Germany
3. Institute of Laboratory Medicine and Human Genetics; Singen Germany
4. Center for Public Health Genomics; University of Virginia; Charlottesville VA USA
5. Department of Medical Psychology and Medical Sociology; Johannes Gutenberg University; Mainz Germany