1. Department of Renal Medicine Royal Infirmary of Edinburgh Edinburgh UK
2. Histocompatibility and Immunogenetics Laboratory Scottish National Blood Transfusion Service, Royal Infirmary Edinburgh Edinburgh UK
3. Medical School University of Edinburgh Edinburgh UK
4. Department of Renal Transplantation NHS Greater Glasgow and Clyde—Queen Elizabeth University Hospital Glasgow UK
5. Histocompatibility and Immunogenetics Laboratory, Gartnavel General Hospital, Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, Glasgow University of Glasgow Glasgow UK