1. Division of Transfusion Medicine, Department of Laboratory Medicine Yale School of Medicine New Haven Connecticut USA
2. Department of Pathology and Laboratory Medicine University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
3. Department of Pathology University of California San Diego La Jolla California USA
4. University of Texas Medical Branch Galveston Texas USA
5. Wing‐Kwai and Alice Lee‐Tsing Chung Transfusion Service, Department of Pathology and Laboratory Medicine David Geffen School of Medicine at UCLA Los Angeles California USA
6. Department of Pathology City of Hope National Medical Center Duarte California USA
7. American Red Cross National Headquarters Washington DC USA
8. Department of Pathology, Microbiology and Immunology Vanderbilt University Medical Center Nashville Tennessee USA
9. Division of Transfusion Medicine and Hemostasis, Department of Pathology University of Texas Southwestern Dallas Texas USA