1. Departments of Surgical Oncology; John Wayne Cancer Institute at Saint John's Health Center; 2200 Santa Monica Blvd Santa Monica CA 90404 U.S.A
2. Department of Pathology, Laboratory Medicine, and Surgery; Jonsson Comprehensive Cancer Center; University of California Los Angeles; Los Angeles CA U.S.A
3. Department of Biostatistics; Jonsson Comprehensive Cancer Center; University of California Los Angeles; Los Angeles CA U.S.A
4. Melanoma Institute Australia; the University of Sydney; Sydney NSW Australia