1Departments of Surgical Oncology, John Wayne Cancer Institute at Saint John's Health Center, Santa Monica, CA
2Sydney Melanoma Unit, Royal Prince Alfred Hospital, Camperdown, NSW, Australia
3Department of Pathology and Laboratory Medicine, University of California at Los Angeles, Los Angeles
4Department of Surgical Oncology, National Cancer Institute, Naples, Italy
5Biostatistics, John Wayne Cancer Institute at Saint John's Health Center, Santa Monica, CA
6Department of Biostatistics, University of California at Los Angeles, Los Angeles
7Department of Surgery, Netherlands Cancer Institute, Amsterdam
8Department of Surgery, New York University School of Medicine, New York
9Department of Surgical Oncology, University Medical Center Groningen and Groningen University, Groningen, the Netherlands
10Department of Surgery, Millard Fillmore Hospital, Buffalo, NY
11Department of Cutaneous Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL
12Department of Surgery, Royal Adelaide Hospital, Adelaide, SA, Australia
13Department of Nuclear Medicine, Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles