1. Blood Borne Virus Unit, Virus Reference Department, Public Health England
2. Transfusion Microbiology, National Health Service Blood and Transplant
3. Department of Clinical Immunology, Royal Free London National Health Service Foundation Trust
4. Institute of Immunity and Transplantation, University College London, Royal Free Campus
5. Statistics, Modelling, and Economics Department, Public Health England
6. Division of Infection and Immunity, University College London, London, United Kingdom