1. Blood Systems Research Institute; San Francisco California
2. Department of Laboratory Medicine; UCSF; San Francisco California
3. UCSF Center for AIDS Prevention Studies; San Francisco California
4. American Red Cross, New England Region; Dedham Massachusetts
5. BloodCenter of Wisconsin; Milwaukee Wisconsin
6. Institute for Transfusion Medicine; Pittsburgh Pennsylvania
7. RTI International; Rockville Maryland
8. National Heart; Lung and Blood Institute (NHLBI); Bethesda Maryland
9. US Food and Drug Administration; Silver Spring Maryland