[1] Inst Canc Res, London SW3 6JB, England
[2] Royal Marsden NHS Fdn Trust, London, England
[3] Royal Marsden NHS Fdn Trust, Sutton, Surrey, England
[4] UCL, MRC, Clin Trials Unit, London, England
[5] Cardiff Univ, Sch Med, Velindre Hosp, Cardiff CF10 3AX, S Glam, Wales
[6] Christie NHS Fdn Trust, Dept Urol, Manchester, Lancs, England
[7] Univ Bern, Bern, Switzerland
[8] Univ Glasgow, Inst Canc Sci, Glasgow, Lanark, Scotland
[9] Univ Hosp Bern, Dept Urol, CH-3010 Bern, Switzerland
[10] Swiss Grp Clin Canc Res SAKK, Bern, Switzerland
[11] Univ Warwick, Warwick, England