1. NHS Blood and Transplant; Haematology/Transfusion Medicine; Level 2, John Radcliffe Hospital Headington Oxford UK OX3 9BQ
2. NHS Blood and Transplant; Systematic Review Initiative; John Radcliffe Hospital Oxford UK OX3 9BQ
3. University of Oxford; Oxford Clinical Trials Research Unit; NDORMS Windmill Road Oxford Oxfordshire UK OX3 7LD
4. University of Oxford; Centre for Statistics in Medicine; Botnar Research Centre Windmill Road Oxford UK OX3 7LD
5. Tropical Medicine Research Institute, The University of the West Indies; Chronic Disease Research Centre; Jemotts Lane Bridgetown Barbados BB11115
6. NHS Blood and Transplant; Colindale Avenue London UK NW9 5BG