1. New England Research Institutes, Watertown, Massachusetts 021721;
2. National Institute of Allergy and Infectious Diseases, Bethesda, Maryland 208922;
3. Chiron Corporation, Emeryville, California 946083;
4. Roche Molecular Systems, Branchburg, New Jersey 088764;
5. Organon Teknika Corporation, Durham, North Carolina 277125;
6. Harvard School of Public Health, Boston, Massachusetts 021156;
7. Rush-Presbyterian-St. Luke’s Medical Center, Chicago, Illinois 606127;
8. Baylor College of Medicine, Houston, Texas 770308;
9. University of Puerto Rico School of Medicine, San Juan, Puerto Rico 00936-50679;
10. UMD-New Jersey Medical School, Newark, New Jersey 0710310;
11. Mount Sinai Medical Center, New York, New York 1002911; and
12. University of Washington, Seattle, Washington 9819512