[1] Royal Marsden Hosp Fdn Trust, Sutton, Surrey, England
[2] MRC Clin Trials Unit, London, England
[3] Cardiff Univ, Sch Med, Cardiff CF10 3AX, S Glam, Wales
[4] Christie & Salford Royal Hosp Fdn Trusts, Manchester, Lancs, England
[5] Univ Bern, Inselspital, CH-3010 Bern, Switzerland
[6] Univ Birmingham, Sch Canc Sci, Birmingham, W Midlands, England
[7] Inst Canc Res, Sutton, Surrey, England
[8] Inst Canc Sci, Glasgow, Lanark, Scotland