1. New England Region, American Red Cross Blood ServicesDedham Massachusetts
2. WestatRockville Maryland
3. Blood Research and Medical Sciences Institutes, Blood Center of WisconsinMilwaukee Wisconsin
4. The Institute for Transfusion MedicinePittsburgh Pennsylvania
5. Department of PathologyUniversity of Texas Medical BranchGalveston Texas
6. Department of Cell BiologyNeurobiology, and Anatomy, Medical College of WisconsinMilwaukee Wisconsin