1. Division of Dermatology, Department of Medicine; University of Washington; Seattle WA USA
2. Department of Dermatology, Massachusetts General Hospital; Harvard Medical School; Boston MA USA
3. Department of Medicine; University of Washington School of Medicine; Seattle WA USA
4. Pathology Associates; Clovis CA USA
5. Department of Pathology and Laboratory Medicine; Hospital of the University of Pennsylvania; Philadelphia PA USA
6. Division of Dermatology, Department of Medicine; University of Washington School of Medicine; Seattle WA USA
7. Dermatopathology Northwest; Bellevue WA USA
8. Department of Pathology, Institut Curie, and Faculty of Medicine; University of Paris Descartes; Paris France