1. Department of Dermatology, Park Nicollet Health Services, Minneapolis, Minnesota
2. Department of Dermatology, University of Minnesota, Minneapolis
3. Department of Dermatology, Minneapolis Veterans Affairs Medical Center, Minneapolis, Minnesota
4. University of Minnesota Medical School, Minneapolis
5. Division of Dermatology, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
6. Division of Dermatology, University of Ottawa, Ottawa, Ontario, Canada
7. Department of Dermatology, University of Wisconsin School of Medicine and Public Health, Madison
8. Department of Dermatology, The George Washington University School of Medicine and Health Sciences, Washington, DC
9. Department of Dermatology, Columbia University Irving Medical School, New York, New York
10. Department of Dermatology, University of California, San Francisco
11. Department of Dermatology, Duke University Medical Center, Durham, North Carolina
12. Division of Dermatology, CHU de Quebec, Laval University, Quebec City, Quebec, Canada
13. Department of Dermatology, Cleveland Clinic, Cleveland, Ohio
14. Department of Dermatology, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire
15. Department of Dermatology, Keck School of Medicine, Los Angeles, California
16. Department of Dermatology, University of Colorado, Boulder