1. Department of Haematology, St James's University Hospital, Leeds, UK
2. Department of Hepatology, St James's University Hospital, Leeds, UK
3. Department of Anaesthesia & Intensive Care Medicine, St James's University Hospital, Leeds, UK
4. HMDS Laboratory and Department of Haematology, St James's University Hospital, Leeds, UK
5. Department of Transplant and Hepatobiliary Surgery, St James's University Hospital, Leeds, UK
6. Histocompatibility & Immunogenetics Laboratory, NHS Blood and Transplant, North Bristol Park, Bristol, UK