1. Department of Dermatology, University of Wisconsin School of Medicine and Public Health, Madison
2. Department of Dermatology, Park Nicollet Health Services, Minneapolis, Minnesota
3. Department of Dermatology, University of Minnesota, Minneapolis
4. Department of Dermatology, Minneapolis Veterans Affairs Medical Center, Minneapolis, Minnesota
5. Department of Dermatology, Columbia University Irving Medical Center, New York, New York
6. Information Network of Departments of Dermatology, Institute at the University Medical Center Göttingen, Göttingen, Germany
7. Department of Dermatology, Leeds Teaching Hospitals National Health Service Trust, Chapel Allerton Hospital, Leeds, England
8. Department of Dermatology, Duke University Medical Center, Durham, North Carolina
9. St John’s Institute of Dermatology, Guy’s Hospital, London, England
10. Department of Dermatology, George Washington University School of Medicine, Washington, DC
11. Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
12. Department of Dermatology, Cleveland Clinic, Cleveland, Ohio
13. Division of Dermatology, University of Louisville, Louisville, Kentucky
14. Department of Dermatology, University of California, San Francisco
15. Division of Dermatology, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
16. Department of Dermatology, Venereology and Allergology, Georg August University, Göttingen, Germany
17. Department of Dermatology, Hospital del Mar, Universitat Pompeu Fabra, Barcelona, Spain
18. Clinica Dermatologica, IRCCS–AOU San Martino–IST and Department of Health Sciences, University of Genoa, Genoa, Italy
19. Division of Dermatology, Geisinger Medical Center, Danville, Pennsylvania
20. Department of Dermatology, University Hospital of Zurich, Zurich, Switzerland
21. Department of Dermatology, Keck School of Medicine, University of Southern California, Los Angeles
22. Department of Dermatology, Leicester Royal Infirmary, Leicester, England
23. Division of Dermatology, University of Ottawa, Ottawa, Ontario, Canada
24. Department of Dermatology and Allergology Biederstein, Faculty of Medicine, Technical University Munich, Munich, Germany
25. Division of Dermatology, Centre Hospitalier Universitaire de Quebec, Laval University, Quebec, Quebec, Canada
26. Department of Dermatology, Venereology and Allergology, St Josef Hospital, University Medical Center, Ruhr University Bochum, Bochum, Germany
27. Department of Dermatology, University Medical Centre Groningen, University of Groningen, Groningen, the Netherlands
28. Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
29. Department of Experimental Dermatology and Cosmetology, Jagiellonian University Medical College, Krakow, Poland
30. Department of Dermatology, University of Colorado, Denver
31. Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy
32. Department of Skin and Venereal Diseases, Lithuanian University of Health Sciences, Kaunas, Lithuania
33. Department of Medical Informatics, Biometry and Epidemiology, University of Erlangen/Nürnberg, Erlangen, Germany