Crystal S Langlais1, June M Chan2,3. 1. Department of Epidemiology & Biostatistics, University of California San Francisco, San Francisco, CA, USA. crystal.langlais@ucsf.edu. 2. Department of Epidemiology & Biostatistics, University of California San Francisco, San Francisco, CA, USA. 3. Department of Urology, University of California San Francisco, San Francisco, CA, USA.