Published on in Vol 20, No 5 (2018): May
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/9310, first published
.
1 Osher Center for Integrative Medicine, University of California, San Francisco, San Francisco, CA, United States
2 Department of Epidemiology & Biostatistics, University of California, San Francisco, San Francisco, CA, United States
3 Department of Urology, University of California, San Francisco, San Francisco, CA, United States