1. Division of Health Services Research, Department of Urology, University of Michigan, Ann Arbor, Michigan
2. Division of Urologic Oncology, Department of Urology, University of Michigan, Ann Arbor, Michigan
3. Health Services Research and Development Center for Clinical Management Research, Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, Michigan
4. Division of General Urology, Department of Urology, University of Michigan, Ann Arbor, Michigan
5. Department of Medicine, University of Michigan, Ann Arbor, Michigan