1. Department of PathologyPittsburgh Pennsylvania
2. The Institute for Transfusion MedicinePittsburgh Pennsylvania
3. Department of Pathology and Laboratory MedicineDartmouth‐Hitchcock Medical CenterLebanon New Hampshire
4. Department of Laboratory Medicine and PathologyUniversity of MinnesotaMinneapolis Minnesota
5. Department of Pathology and Laboratory MedicineEmory University School of MedicineAtlanta Georgia
6. Brigham and Women's Hospital Adult Transfusion ServiceBoston Massachusetts
7. NHS Blood & Transplant, Oxford University Hospitals, and University of OxfordOxford UK
8. Department of PathologyBeth Israel Deaconess Medical CenterBoston Massachusetts
9. Department of Pathology and Laboratory MedicineUniversity of North Carolina, Chapel Hill, North Carolina; the McGowan Institute for Regenerative MedicinePittsburgh Pennsylvania
10. Oxford University HospitalsOxford UK
11. Departments of Anesthesiology and BioengineeringUniversity of PittsburghPittsburgh Pennsylvania