1. Histocompatibility and Immunogenetics Laboratories; National Health Service Blood and Transplant (NHSBT); Colindale, London UK
2. Department of Haematology; University of Cambridge and NHSBT Cambridge, Cambridge Biomedical Campus
3. Medical Research Council Biostatistics Unit; Cambridge Biomedical Campus; Cambridge UK
4. National Institute for Biological Standards and Control Medicines and Healthcare Products Regulatory Agency; Potters Bar UK
5. Etablissement Français du Sang Rhône-Alpes (EFS); Lyon France
6. Platelet and Leukocyte Serology Department; Sanquin Diagnostic Services; Amsterdam the Netherlands
7. Histocompatibility and Immunogenetics Laboratories; National Health Service Blood and Transplant (NHSBT); Filton, Bristol UK
8. Hospital Sirio Libanês Blood Bank; São Paulo Brazil
9. University Hospital North Norway; Tromso Norway
10. International Blood Group Reference Laboratory (IBGRL); Filton Bristol UK
11. Division of Infection and Immunity; University College London; London UK.