[1] Cleveland Clinic Foundation,Section of Urologic Oncology, Urological Institute
[2] M.D. Anderson Cancer Center,Department of Clinical Cancer Prevention
[3] University of Texas Health Sciences Center,Division of Urology
[4] Fred Hutchinson Cancer Research Center,Southwest Oncology Group Statistical Center
[5] National Cancer Institute,Cancer Prevention Studies Branch, Division of Clinical Sciences
[6] Southwest Oncology Group,undefined