1. Dermatology Service, Veterans Affairs Palo Alto Health Care System, Palo Alto, California2Pigmented Lesion and Melanoma Program, Department of Dermatology, Stanford University Medical Center and Cancer Institute, Stanford, California
2. Department of Social and Behavioral Sciences, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
3. Dermatology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York