[1] Macmillan Canc Support, 89 Albert Embankment, London SE1 7UQ, England
[2] Royal Coll Radiologists, 63 Lincolns Inn Fields, London WC2A 3JW, England
[3] NHS Improvement Wellington, Dept Hlth, Waterloo Rd, London SE1 8UG, England
[4] Hillingdon Hosp NHS Fdn Trust, Uxbridge UB8 3NN, Middx, England