1. Department of Radiology, University of Wisconsin School of Medicine and Public Health, E3/366 Clinical Science Center, 600 Highland Ave, Madison, WI 53792-3252.
2. Department of Urology, University of Wisconsin School of Medicine and Public Health, Madison, WI.
3. Department of Biostatistics, University of Wisconsin, Madison, WI.
4. Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA.
5. Department of Radiology, Davis Medical Center, University of California, Davis, CA.