1 Blood Transfusion Service and Division of Hematology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA. Electronic address: sdzik@partners.org.
2 Consultant Haematologist, NHS Blood & Transplant and Oxford University Hospitals NHS Foundation Trust, University of Oxford, Oxford, England.
3 School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia; Department of Haematology, Monash Health, Melbourne, Australia.
4 Department of Pathology and Molecular Medicine, Kingston Health Sciences Centre and Queen's University, Kingston, Ontario, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.