[1] Univ Cardiff Wales, Welsh Sch Med, Cardiff, Wales
[2] N London Canc Network, London, England
[3] Birmingham Heartlands Hosp, Birmingham, W Midlands, England
[4] Leicester Royal Infirm, Leicester, Leics, England
[5] City Hosp Nottingham, London, England
[6] Yorkhill Royal Hosp Sick Children, Glasgow, Lanark, Scotland
[7] Univ Birmingham, Clin Trials Unit, Birmingham, W Midlands, England