1. NHS Blood and Transplant and Radcliffe Department of Medicine, University of Oxford, United Kingdom (L.J.E.)
2. University of Minnesota, Department of Laboratory Medicine and Pathology, Minneapolis, Minnesota (C.S.C.)
3. University of Washington, Department of Laboratory Medicine and Pathology, Seattle, Washington (M.B.P.)
4. Evidence-based Oncology, Department of Internal Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany (C.I., N.K., N.S.)
5. University of California San Diego, Department of Pathology, La Jolla, California (E.S.A.)
6. The Johns Hopkins University School of Medicine, Department of Pathology, Baltimore, Maryland (E.M.B., R.G., A.A.R.T.)
7. Minneapolis, Minnesota (G.B.)
8. The Johns Hopkins University School of Public Health, Department of Molecular Microbiology and Immunology, Baltimore, Maryland (A.C.)
9. Canadian Blood Services, Vancouver, British Columbia, Canada (D.V.D.)
10. University Health Network, Ted Rogers Centre for Heart Research, Toronto, and Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada (F.F.)
11. NorthShore University Health System, Department of Pathology and Laboratory Medicine, Evanston, Illinois (T.J.G.)
12. Innovative Blood Resources, Division of New York Blood Center Enterprises, St. Paul, Minnesota (J.G.)
13. Washington University in St. Louis School of Medicine, Department of Pathology and Immunology, St. Louis, Missouri (B.J.G.)
14. Mayo Clinic, Department of Anesthesiology and Perioperative Medicine, Rochester, Minnesota (M.J.J.)
15. University of Utah, Department of Pathology, Salt Lake City, Utah (R.A.M.)
16. University of New Mexico, Department of Pathology, Albuquerque, New Mexico (J.S.R.)
17. Vanderbilt University Medical Center, Division of Allergy, Pulmonary, and Critical Care Medicine, Nashville, Tennessee (T.W.R.)
18. Duke University, Department of Pathology, Durham, North Carolina (B.H.S.)
19. Vitalant, Medical Affairs, Scottsdale, Arizona (R.R.V.)
20. Mayo Clinic, Department of Laboratory Medicine and Pathology, Rochester, Minnesota (J.L.W.).