1. Department of Pathology Brigham and Women's Hospital Boston Massachusetts USA
2. Wing‐Kwai and Alice Lee‐Tsing Chung Transfusion Service, Department of Pathology and Laboratory Medicine, David Geffen School of Medicine University of California Los Angeles Los Angeles California USA
3. Canadian Blood Services Vancouver British Columbia Canada
4. Irish Blood Transfusion Service Dublin Ireland
5. Transfusion Medicine Service, Department of Pathology Stanford University School of Medicine Stanford California USA
6. Department of Pathology and Laboratory Medicine University of British Columbia Vancouver British Columbia Canada
7. Transfusion Medicine and Therapeutic Pathology, Department of Pathology University of New Mexico Albuquerque New Mexico USA
8. Stanford Blood Center Palo Alto California USA
9. Department of Laboratory Medicine and Pathology, Transfusion Medicine Division University of Washington Seattle Washington USA
10. National Maternity Hospital Dublin Ireland
11. Department of Pathology and Laboratory Medicine BC Women's and Children's Hospital Vancouver British Columbia Canada
12. Vancouver Island Health Authority Courtenay British Columbia Canada
13. Department of Pathology University of Pittsburgh Pittsburgh Pennsylvania USA