[1] Univ Warwick, Clin Trials Unit, Coventry CV4 7AL, W Midlands, England
[2] UCL, Med Res Council Clin Trials Unit, Inst Clin Trials & Methodol, London, England
[3] Cardiff Univ, Sch Med, Cardiff CF10 3AX, S Glam, Wales
[4] Christie NHS Fdn Trust, Dept Urol, Manchester, Lancs, England
[5] Inst Canc Res, London SW3 6JB, England
[6] Royal Marsden Hosp NHS Trust, Acad Unit Radiotherapy, London, England
[7] UCL, Med Res Council Clin Trials Unit, London, England
[8] Royal Marsden Hosp, Dept Radiotherapy, London SW3 6JJ, England
[9] Beatson West Scotland Canc Ctr, Inst Canc Sci, Glasgow, Lanark, Scotland
[10] Cardiff Univ, Cardiff CF10 3AX, S Glam, Wales
[11] Velindre NHS Trust, Sch Med, Cardiff, S Glam, Wales
[12] Kantonsspital Graubunden, Dept Oncol, Chur, Switzerland
[13] Royal Sussex Cty Hosp, Sussex Canc Ctr, Brighton BN2 5BE, E Sussex, England
[14] Guys Hosp, Dept Med Oncol, London SE1 9RT, England
[15] Southend Hosp, Dept Oncol, Southend On Sea, England
[16] Basildon Hosp, Dept Oncol, Southend On Sea, England
[17] Poole Hosp NHS Fdn Trust, Poole, Dorset, England
[18] Royal Bournemouth Hosp NHS Fdn Trust, Dept Oncol, Poole, Dorset, England
[19] East Lancashire Hosp NHS Trust, Dept Oncol, Blackburn, Lancs, England
[20] Musgrove Pk Hosp, Oncol & Haematol Clin Trials Unit, Taunton, Somerset, England