1. NHS Blood and Transplant; Systematic Review Initiative; Oxford UK
2. John Radcliffe Hospital; Emergency Department; Headley Way Oxford Oxon UK OX39DU
3. University of Oxford; Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences; Botnar Research Centre Oxford Oxfordshire UK OX3 7LD
4. NHS Blood and Transplant; Haematology/Transfusion Medicine; Level 2, John Radcliffe Hospital Headington Oxford UK OX3 9BQ