1. Cornell Scott-Hill Health Center, New Haven, Connecticut
2. Kaiser Permanente Washington Health Research Institute, Seattle
3. Departments of Pharmacy and Epidemiology, University of Washington, Seattle
4. Department of Pathology, Institut Curie, and Faculty of Medicine, University of Paris Descartes, Paris, France
5. Departments of Dermatology and Epidemiology, Brown University, Providence, Rhode Island
6. Center for Dermatoepidemiology, Department of Veterans Affairs Medical Center, Providence, Rhode Island
7. Department of Dermatology, Rhode Island Hospital, Providence, Rhode Island
8. Division of Dermatology, Department of Medicine, University of Washington, Seattle
9. Group Health Capitol Hill Campus, Seattle, Washington
10. Dermatopathology Northwest, Bellevue, Washington
11. Department of Pathology and Laboratory Medicine, Hospital of the University of Pennsylvania, Philadelphia
12. Pathology Associates, Clovis, California
13. The Dartmouth Institute for Health Policy and Clinical Practice, Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire
14. Department of Medicine Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire
15. Norris Cotton Cancer Center, Lebanon, New Hampshire
16. Department of Medicine, University of Washington School of Medicine, Seattle