1. Department of Epidemiology and Pediatrics, Norris Cotton Cancer Center, Hanover, NH
2. Department of Medicine, Norris Cotton Cancer Center, Hanover, NH
3. Departments of Medicine and Community and Family Medicine, Dartmouth Institute for Health Policy and Clinical Practice, Geisel School of Medicine at Dartmouth, Norris Cotton Cancer Center, Hanover, NH
4. Departments of Medical Informatics and Clinical Epidemiology and Medicine, Portland
5. Department of Family Medicine, Oregon Health and Science University, Portland
6. Department of Pathology, Institut Curie, Paris Sciences and Letters Research University, University of Paris Descartes, Paris, France
7. Department of Pathology and Laboratory Medicine, Hospital of the University of Pennsylvania, Philadelphia
8. Center for Dermatoepidemiology, VA Medical Center, Providence Department of Dermatology, Rhode Island Hospital, Providence
9. Departments of Dermatology and Epidemiology, Brown University, Providence, RI
10. Division of Dermatology, Department of Medicine, University of Washington School of Medicine, Seattle
11. Dermatopathology Northwest, Bellevue, WA
12. Department of Medicine, University of California, Los Angeles, David Geffen School of Medicine, Los Angeles, CA