1. Department of Pathology University of Pittsburgh Pittsburgh Pennsylvania USA
2. Department of Pathology and Molecular Medicine Kingston health Sciences Centre and Queen's University Kingston Ontario Canada
3. Division of Pathology and Laboratory Medicine Children's National Hospital Washington District of Columbia USA
4. Department of Pathology and Pediatrics George Washington University Medical School Washington District of Columbia USA
5. Department of Pathology University of Maryland School of Medicine Baltimore Maryland USA
6. Department of Pathology and Laboratory Medicine Dartmouth‐Hitchcock Medical Center Lebanon New Hampshire USA
7. Department of pathology University of Vermont Medical Center Burlington Vermont USA
8. Transfusion Service, Harborview Medical Center and the Department of Laboratory Medicine and Pathology University of Washington School of Medicine Seattle Washington USA
9. Department of Surgery University of New Mexico Albuquerque New Mexico
10. National Health Service Blood and Transplant, and Oxford Biomedical Research Centre Oxford UK
11. Department of Pathology University of New Mexico Albuquerque New Mexico
12. Hospital Sírio‐Libanês Blood Bank São Paulo Brazil
13. Wing‐Kwai and Alice Lee‐Tsing Chung Transfusion Service, Department of Pathology and Laboratory Medicine UCLA Health Los Angeles California USA