1. NHSBT and Radcliffe Department of Medicine; University of Oxford; Oxford UK
2. NHSBT and Department of Haematology; North Bristol NHS Trust; Bristol UK
3. NHSBT and Department of Haematology; Royal London Hospital; London UK
4. Department of Haematology; Royal Cornwall Hospital Trust; Cornwall UK
5. Department of Critical Care Medicine & Anaesthesia; City Hospitals Sunderland NHS Foundation Trust; Sunderland UK
6. Department of Haematology; Royal Devon & Exeter NHS Foundation Trust; Exeter UK
7. School of Cellular and Molecular Medicine; University of Bristol; Bristol UK
8. NHSBT and Department of Haematology; John Radcliffe Hospital; Oxford UK
9. NHSBT; Newcastle upon Tyne UK