[1] Univ Warwick, Coventry CV4 7AL, W Midlands, England
[2] UCL, MRC Clin Trials Unit, London, England
[3] Christie NHS Fdn Trust, Dept Urol, Manchester, Lancs, England
[4] Royal Marsden Hosp NHS Fdn Trust, Inst Canc Res, London, England
[5] Beatson West Scotland Canc Ctr, Glasgow, Lanark, Scotland
[6] Univ Bern, Dept Urol, Bern, Switzerland
[7] Cardiff Univ, Sch Med, Velindre Hosp, Cardiff CF10 3AX, S Glam, Wales