1. Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Boston
2. Pathology Service and Dermatopathology Unit, Massachusetts General Hospital, Harvard Medical School, Boston3Dermatology Department, University of Sao Paulo, Sao Paulo, Brazil
3. Department of Surgical Oncology, Massachusetts General Hospital, Harvard Medical School, Boston
4. Biostatistics Center, Massachusetts General Hospital, Harvard Medical School, Boston
5. Division of Transplant Surgery, Massachusetts General Hospital, Harvard Medical School, Boston
6. Center for Melanoma, Massachusetts General Hospital, Harvard Medical School, Boston
7. Pathology Service and Dermatopathology Unit, Massachusetts General Hospital, Harvard Medical School, Boston