1. Wisconsin Regional Primate Research Center, University of Wisconsin, Madison, Wisconsin 53715
2. Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia 30322
3. Section on Statistical Genetics, Department of Biostatistics and Clinical Nutrition Research Center and Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, Alabama 35294
4. Epimmune Inc., San Diego, California 92121
5. New England Regional Primate Research Center, Southborough, Massachusetts 01772
6. GSF-Institute for Molecular Virology, Munich, Germany 81675
7. Department of Pathology and Laboratory Medicine, University of Wisconsin Medical School, Madison, Wisconsin 53706