1. Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania.
2. RAND Corporation, Santa Monica, California.
3. Dell Medical School of the University of Texas, Austin, Texas.
4. Department of Urology, Division of Health Services Research, University of Michigan, Ann Arbor, Michigan.
5. Department of Urology, Division of Oncology, University of Michigan, Ann Arbor, Michigan.
6. Department of Urology, Division of Endourology, University of Michigan, Ann Arbor, Michigan.
7. Department of Urology, David Geffen School of Medicine, University of California, Los Angeles, California.