[1] Univ Southampton, Sch Med, Southampton, Hants, England
[2] Guys & St Thomas NHS Fdn Trust, Dept Clin Oncol, London, England
[3] Wirral Univ Teaching Hosp NHS Fdn Trust, Dept Radiol, Wirral, Merseyside, England
[4] Royal Wolverhampton NHS Trust, Dept Clin Oncol, Wolverhampton, England
[5] St Jamess Inst Oncol, Leeds Canc Ctr, Dept Clin Oncol, Leeds, W Yorkshire, England