1. Blood Research Institute Versiti Milwaukee WI Milwaukee Wisconsin USA
2. Public Health and Epidemiology Practice, Westat Rockville Maryland USA
3. Columbia University New York New York USA
4. American Red Cross Scientific Affairs Farmington Connecticut USA
5. Department of Pathology Johns Hopkins University School of Medicine Baltimore Maryland USA
6. Medical Sciences Institute, Versiti Milwaukee Wisconsin USA
7. Department of Laboratory Medicine Yale University School of Medicine New Haven Connecticut USA
8. Department of Pathology and Laboratory Medicine, Center for Transfusion and Cellular Therapies Emory University School of Medicine Atlanta Georgia USA
9. Columbia University Irving Medical Center New York New York USA
10. Cancer and Blood Disorders Institute, Johns Hopkins All Children's Hospital, St. Petersburg, FL., and Departments of Oncology and Pediatrics Johns Hopkins University School of Medicine Baltimore Maryland USA
11. New York‐Presbyterian New York New York USA
12. University of British Columbia Victoria British Columbia Canada
13. Vitalant Research Institute San Francisco California USA
14. Children's Hospital Boston Boston Massachusetts USA