1. Bristol Medical School,
2. School of Cellular and Molecular Medicine, and
3. Wolfson Bioimaging Facility, Faculty of Life Sciences, University of Bristol, Bristol, United Kingdom;
4. Department of Haematology, University of Cambridge, Cambridge, United Kingdom;
5. Medical Research Council Biostatistics Unit, Cambridge Institute of Public Health, Cambridge, United Kingdom;
6. NIHR BioResource–Rare Diseases, Cambridge University Hospitals, Cambridge, United Kingdom; and
7. NHS Blood and Transplant, Cambridge Biomedical Campus, Cambridge, United Kingdom