1. Department of Urology; Yale School of Medicine; New Haven Connecticut USA
2. Yale Center for Analytical Sciences; Yale School of Medicine; New Haven Connecticut USA
3. Division of Cancer Epidemiology and Genetics; National Cancer Institute; Bethesda Maryland USA
4. Kaiser Permanente Division of Research; Kaiser Permanente San Francisco Medical Center; San Francisco California USA
5. Department of Epidemiology; University of Texas MD Anderson Cancer Center; Houston Texas USA