Affiliation: | The Anthony Nolan Research Institute, The Royal Free Hospital, Pond Street. Hampstead, London NW3 2QG;United Kingdom Transplant Support Service Authority, Fox Den Road, Bristol, BS12 6RR;Department of Haematology, Royal Free Hospital School of Medicine, London, NW3 2QG.;Department of Haematology, Royal Postgraduate Medical School, Du Cane Road, London, W12 ONN |