1 MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford.
2 MRC Translational Immune Discovery Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford.
3 NIHR Blood and Transplant Research Unit in Data Drive Transfusion Practice, Radcliffe Department of Medicine, University of Oxford, Oxford, UK; NHSBT Blood and Transplant, Oxford.
4 Department of Clinical Biochemistry, Oxford University Hospitals NHS Foundation Trust, Oxford.
5 Oxford Critical Care, Oxford University Hospitals NHS Foundation Trust, Oxford.
6 Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford.
7 MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK; Department of Haematology, Oxford University Hospitals NHS Foundation Trust, Oxford.
8 NIHR Blood and Transplant Research Unit in Data Drive Transfusion Practice, Radcliffe Department of Medicine, University of Oxford, Oxford, UK; Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford. akshay.shah@linacre.ox.ac.uk.