[1] Christie NHS Fdn Trust, Manchester, Lancs, England
[2] Univ Nottingham Hosp, Nottingham, England
[3] Northwick Pk Hosp & Clin Res Ctr, Harrow, Middx, England
[4] Queens Hosp, Romford, Essex, England
[5] Birmingham Heartlands Hosp, Birmingham, W Midlands, England
[6] Royal Liverpool Univ Hosp, Liverpool, Merseyside, England
[7] Cardiff Univ, Inst Canc & Genet, Sch Med, Dept Haematol, Cardiff, Wales
[8] Cardiff Univ Sch Med, Cardiff, Wales