[1] Univ Leicester, Leicester, Leics, England
[2] Univ Sheffield, Sheffield Ecmc, Sheffield, S Yorkshire, England
[3] Univ Coll London Hosp, CRUK Luncer Canc Ctr Excellence, London, England
[4] Univ Oxford, Dept Oncol, Oxford, England
[5] Univ Sheffield, Weston Pk Hosp, Dept Oncol, Sheffield, S Yorkshire, England
[6] UCL, Canc Res UK & UCL Canc Trials Ctr, London, England
[7] Univ Hosp Leicester NHS Trust, Leicester, Leics, England
[8] Aberdeen Royal Infirm, Aberdeen, Scotland
[9] Manchester Univ NHS Fdn Trust, Wythenshawe Hosp, Manchester, Lancs, England