1 Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA, USA. Electronic address: rebecca.graff@ucsf.edu.
2 Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA, USA.
3 Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA, USA; Department of Urology, University of California, San Francisco, San Francisco, CA, USA; Helen Diller Comprehensive Cancer Center, University of California, San Francisco, San Francisco, CA, USA.