1. Department of Pathology and Center for Biostatistics, The Ohio State University College of Medicine, Columbus, Ohio 43210
2. Center for Biostatistics, The Ohio State University College of Medicine, Columbus, Ohio 43210
3. Memorial Sloan-Kettering Cancer Center, New York, NY 10065
4. University of Nevada School of Medicine, Reno, NV 89557
5. Nevada Cancer Institute, Las Vegas, NV 89135