1. Wisconsin Primate Research Center
2. Department of Pathology and Laboratory Medicine, University of Wisconsin, Madison, Wisconsin 53715
3. Department of Veterinary and Biomedical Sciences, University of Minnesota, St. Paul, Minnesota 55108;
4. Center for Comparative Medicine, California National Primate Research Center
5. Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine
6. Department of Infectious Disease, School of Medicine, University of California, Davis, California 95616
7. Department of Microbiology, University of Minnesota Medical School, Minneapolis, Minnesota 55455