1. Department of Pathology, University of Pennsylvania, Philadelphia, Pennsylvania
2. Emory Vaccine Center and Yerkes National Primate Research Center, Atlanta, Georgia
3. Department of Microbiology, University of Minnesota, Minneapolis, Minnesota
4. New England Primate Research Center, Harvard Medical School, Southborough, Massachusetts
5. Tulane National Primate Research Center, Covington, Louisiana
6. Seattle Biomedical Research Institute, Seattle, Washington
7. Los Alamos National Laboratory, Los Alamos, New Mexico
8. University of Rochester, Rochester, New York
9. Gilead Sciences, Inc., Foster City, California
10. Merck Vaccine Division, Merck & Co., Inc., West Point, Pennsylvania