1. Dermatology Service; Department of Medicine; Memorial Sloan Kettering Cancer Center; New York NY 10022 U.S.A.
2. Dermatology Service; Melanoma Unit; Hospital Clínic Barcelona; CIBERER; University of Barcelona; Barcelona Spain
3. Melanoma and Skin Cancer Unit; Department of Dermatology; Facultad de Medicina; Pontificia Universidad Católica de Chile; Santiago Chile
4. Pigmented Lesion Clinic of Skin and Cancer Associates; Plantation FL U.S.A.