1. School of Public Health, University of California, Berkeley;
2. Blood Systems Research Institute, San Francisco, CA;
3. Hoxworth Blood Center, University of Cincinnati, OH;
4. City of Hope Medical Center, Duarte, CA;
5. American Red Cross Blood Services, Southern California Region, Pomona;
6. American Red Cross Blood Services, Greater Chesapeake and Potomac Region, Baltimore, MD;
7. Sylvan N. Goldman Center, Oklahoma Blood Institute, Oklahoma City;
8. American Red Cross Blood Services, Southeastern Michigan Region, Detroit; and
9. University of California at San Francisco