1. Kaiser Permanente Northern California Division of Research Oakland California
2. Vitalant Research Institute San Francisco California
3. Department of Laboratory Medicine UCSF San Francisco California
4. RTI International Rockville Maryland
5. Veterans Affairs Healthcare System San Francisco California
6. Department of Medicine, Solna, Clinical Epidemiology Division Karolinska Institutet Stockholm Sweden
7. Department of Cardiology Södersjukhuset Stockholm Sweden
8. American Red Cross Blood Services Connecticut Region Farmington Connecticut
9. Institute for Transfusion Medicine Pittsburgh Pennsylvania
10. National Heart, Lung, and Blood Institute, NIH Bethesda Maryland
11. University of British Columbia Victoria Canada