1. UK NEQAS for Leucocyte Immunophenotyping; Sheffield Teaching Hospitals NHS Foundation Trust; Sheffield UK
2. Transplantation Laboratory; Manchester Royal Infirmary; Central Manchester University Hospitals NHS Foundation Trust; Manchester UK
3. West Midlands Regional Genetics Service; Birmingham's Women's NHS Foundation Trust; Birmingham UK
4. Molecular Diagnostics and Immunophenotyping; Nottingham University Hospitals NHS Trust; Nottingham UK
5. Northern Genetics Service; Institute of Genetic Medicine; The Newcastle upon Tyne Hospitals NHS Foundation Trust; Newcastle upon Tyne UK
6. Sheffield Diagnostic Genetics Service, Sheffield Children's NHS Foundation Trust; Sheffield UK
7. Department of Haematology; Western General Hospital; Edinburgh UK
8. Histocompatibility and Immunogenetics Laboratory; NHS Blood and Transplant; Filton UK
9. St James Hospital; Dublin Ireland
10. Haematological Medicine; Rayne Institute; King's College Hospital NHS Foundation Trust; London UK
11. Department of Haematology; Sheffield Teaching Hospitals NHS Foundation Trust; Sheffield UK