1. Wolfson Institute of Population Health, Queen Mary University of London London
2. Systematic Review Initiative, National Health Service Blood and Transplant Oxford UK
3. Nuffield Division of Clinical Laboratory Sciences, Radcliffe Department of Medicine University of Oxford Oxford UK
4. Barts and the London, School of Medicine and Dentistry London UK
5. East London NHS Foundation Trust London UK
6. Barts Health NHS Trust London UK
7. National Health Service Blood and Transplant London UK
8. Blizard Institute, Queen Mary University of London London UK