1. Department of Dermatology; Georg-August-University Göttingen; Göttingen Germany
2. Department of Dermatology and Allergy; University Bonn; Bonn Germany
3. Department of Dermatology; University Münster; Münster Germany
4. Institute of Human Genetics; Friedrich-Alexander-Universität Erlangen-Nürnberg; Erlangen Germany
5. Department of Dermatology; Fachklinik Bad Bentheim; Bad Bentheim Germany
6. Department of Dermatology; University of Essen; Essen Germany
7. Department of Dermatology and Allergology; Ludwig-Maximilian University Munich; Munich Germany
8. Department of Dermatology; University Hospital Erlangen; Erlangen Germany
9. Department of Dermatology; University Hospital Heidelberg; Heidelberg Germany
10. Department of Dermatology and Allergology; Hospital Bayreuth; Bayreuth Germany
11. Department of Dermatology and Allergy; Charité Universitätsmedizin Berlin; Berlin Germany
12. Dermatologikum Hamburg; Hamburg Germany
13. Department of Dermatology; Klinikum Dortmund; Dortmund Germany
14. Institute for Health Services Research in Dermatology and Nursing; University Medical Center Hamburg-Eppendorf; Hamburg Germany
15. Department of Dermatology, Dermatology Clinic; University of Tartu; Tartu Estonia
16. Department of Pathophysiology; University of Tartu; Tartu Estonia
17. Department of Dermatology; University of Kiel; Kiel Germany
18. Institute of Occcupational, Social and Environmental Medicine; Georg-August-University Göttingen; Göttingen Germany
19. Department of Internal Medicine 3 - Rheumatology and Immunology; Universitätsklinikum Erlangen; Erlangen Germany
20. Bioinformatics; Institute of Biochemistry; Friedrich-Alexander-Universität Erlangen-Nürnberg; Erlangen Germany