1. The Institute for Transfusion Medicine; Pittsburgh Pennsylvania
2. Westat; Rockville Maryland
3. Blood Center of Wisconsin; Milwaukee Wisconsin
4. Department of Cell Biology, Neurobiology and Anatomy; Medical College of Wisconsin; Milwaukee Wisconsin
5. Hoxworth Blood Center; University of Cincinnati Academic Health Center; Cincinnati Ohio. University of California at San Francisco and Blood Systems Research Institute; San Francisco California. CSL Plasma; Boca Raton Florida. New England Region; American Red Cross Blood Services; Farmington Connecticut