1 Department of Urology, Stanford University School of Medicine, Stanford, CA; Veterans Affairs Palo Alto Healthcare System, Palo Alto, CA.
2 Rand Corporation, Santa Monica, CA.
3 Veterans Affairs Palo Alto Healthcare System, Palo Alto, CA; Department of Health Research and Policy, Stanford University School of Medicine, Stanford, CA.
4 Department of Urology, Stanford University School of Medicine, Stanford, CA.
5 Department of Medicine, Stanford University School of Medicine, Stanford, CA.
6 Department of Urology, University of California, Los Angeles School of Medicine, Los Angeles, CA; Department of Health Services, University of California, Los Angeles School of Medicine, Los Angeles, CA.