1. Department of Urology, David Geffen School of Medicine; University of California at Los Angeles; Los Angeles California
2. Veterans Affairs Atlanta Healthcare System; Decatur Georgia
3. Department of Urology; Emory University School of Medicine; Atlanta Georgia
4. Veterans Affairs Greater Los Angeles Healthcare System; Los Angeles California
5. Center for Clinical Management Research, Health Services Research and Development Service, Veterans Affairs Ann Arbor Healthcare System; Ann Arbor Michigan
6. Dow Division of Health Services Research, Department of Urology; University of Michigan; Ann Arbor Michigan
7. Department of Health Policy and Management; University of California at Los Angeles Fielding School of Public Health; Los Angeles California