1. Cancer Prevention and Control Program, Lombardi Comprehensive Cancer Center, Georgetown University, Washington, DC, USA
2. Department of Biostatistics, Bioinformatics, and Biomathematics, Lombardi Comprehensive Cancer Center, Georgetown University, Washington, DC, USA
3. Division of General Internal Medicine, University of Iowa Carver College of Medicine/Iowa City VA Medical Center, Iowa City, IA, USA
4. Holden Comprehensive Cancer, University of Iowa, Iowa City, IA, USA
5. Division of Research, Kaiser Permanente Northern California, Oakland, CA, USA
6. Department of Urology, Kaiser Permanente East Bay, Oakland, CA, USA