1. McMaster Centre for Transfusion Research; McMaster University; Hamilton Canada
2. Department of Oncology; Hamilton Health Sciences Centre; Hamilton Canada
3. Haematology/Transfusion Medicine; NHS Blood and Transplant; Oxford UK
4. Nuffield Department of Clinical Laboratory Sciences; University of Oxford; Oxford UK
5. Medicine; Yale School of Medicine; New Haven Connecticut USA
6. Medicine; University of Toronto; Toronto Canada
7. Oncology; Hamilton Health Sciences Centre; Hamilton Canada
8. Systematic Review Initiative; NHS Blood and Transplant; Oxford UK
9. Clinical Epidemiology Program; Ottawa Hospital Research Institute; Ottawa Canada
10. Division of Hematology and Thromboembolism, Department of Medicine; McMaster University; Ontario Canada
11. McMaster University; Hamilton Canada