[1] Univ Michigan, Ann Arbor, MI 48109 USA
[2] Northwestern Univ, Robert H Lurie Comprehens Canc Ctr, Chicago, IL 60611 USA
[3] Univ Michigan, Sch Med, Div Biostat, Ann Arbor, MI USA
[4] Prostate Canc Clin Trials Consortium LLC, New York, NY USA
[5] Univ Calif San Francisco, San Francisco, CA 94143 USA