1. U.S. Food and Drug Administration/Center for Biologics Evaluation and Research/Office of Biostatistics and Epidemiology Silver Spring Maryland USA
2. NORC at the University of Chicago Chicago Illinois USA
3. American Red Cross Rockville Maryland USA
4. Vitalant Research Institute Scottsdale Arizona USA
5. New York Blood Center New York New York USA
6. OneBlood Tampa Florida USA
7. Blood Research InstituteVersiti Wisconsin Milwaukee Wisconsin USA