1. Department of Pathology Brigham and Women's Hospital Boston Massachusetts
2. Harvard Medical School Boston Massachusetts
3. Department of Haematology University of Cambridge Cambridge UK
4. NHS Blood and Transplant Cambridge UK
5. New York Blood Center New York New York
6. NIHR BioResource Cambridge University Hospitals NHS Foundation Trust Cambridge UK
7. Laboratory for Molecular Medicine Boston Massachusetts
8. Partners Personalized Medicine Boston Massachusetts
9. Broad Institute of MIT and Harvard Boston Massachusetts
10. Division of Genetics, Department of Medicine Brigham and Women's Hospital Boston Massachusetts
11. Wellcome Sanger Institute Cambridge UK