- Correspondence to Dr Benjamin N Breyer, Department of Urology, University of California, San Francisco, Zuckerberg San Francisco General Hospital and Trauma Center, 1001 Potrero Ave Suite 3A20, San Francisco, CA 94110, USA;
- Received 28 November 2016
- Revised 27 February 2017
- Accepted 29 March 2017
- Published online 1 June 2017.
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