1. Department of Urology, University of California-Irvine, Irvine, California
2. Department of Urology, Long Beach Veterans Administration Hospital, Long Beach, California
3. Department of Pathology and Laboratory Medicine, University of California-Irvine, Irvine, California
4. Department of Urology and Statistics, University of California-Irvine, Irvine, California
5. Center for Health Policy Research, University of California-Irvine, Irvine, California
6. Department of Urology, Southern California Permanente Medical Group, Pasadena, California