1. Division of Blood Diseases and Resources; National Heart, Lung, and Blood Institute; Bethesda Maryland
2. Department of Anesthesiology and Critical Care Medicine; Johns Hopkins Hospital; Baltimore Maryland
3. Department of Hematology and the Department of Pediatrics; The Children's Hospital of Philadelphia; Philadelphia Pennsylvania
4. Department of Pediatrics; St Louis Children's Hospital; St Louis Missouri
5. National Institutes of Health; Bethesda Maryland
6. Department of Laboratory Medicine; Yale University; New Haven Connecticut
7. Department of Pathology and Laboratory Medicine; Emory University; Atlanta Georgia
8. Blood Research Institute, Blood Center of Wisconsin, and the Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin; Milwaukee Wisconsin
9. Department of Pathology; Brigham and Women's Hospital
10. Department of Newborn Medicine; Children's Hospital; Boston Massachusetts
11. Washington University in St Louis; St Louis Missouri
12. NHS Blood and Transplant; John Radcliffe Hospital, and Oxford Clinical Research in Transfusion Medicine, Nuffield Division of Clinical Laboratory Sciences, University of Oxford; Oxford UK
13. Department of Pediatrics; University of Minnesota; Minneapolis Minnesota
14. Division of Blood Diseases and Resources; NHLBI/NIH
15. National Heart, Lung, and Blood Institute; Bethesda Maryland
16. Division of Laboratory Medicine; Children's National Health System; Washington DC