1 Department of Urology, Royal Devon and Exeter Hospital, Exeter, UK; University of Exeter Medical School, Exeter, UK. Electronic address: john.mcgrath4@nhs.net.
2 Department of Urology, UNC Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA.
3 Division of Urology, The University of Texas Medical Branch, Galveston, TX, USA.