Affiliation: | 1. Barts and the London School of Medicine and Dentistry, Queen Mary University of London, , London, UK;2. Barts Health NHS Trust, , London, UK;3. NHS Blood and Transplant, , London, UK;4. University Hospital of Wales, , Cardiff, UK;5. John Radcliffe Hospital, , Oxford, UK;6. Royal Hallamshire Hospital, , Sheffield, UK;7. Barking, Havering and Redbridge University Hospitals NHS Trust, , Romford, UK;8. Glasgow Royal Infirmary, , Glasgow, UK |