1. Center for Comparative Medicine
2. California National Primate Research Center
3. Department of Infectious Disease and Microbiology, University of Pittsburgh, Pittsburgh, Pennsylvania
4. Division of Biostatistics, Department of Epidemiology and Preventive Medicine, School of Medicine, University of California—Davis, Davis, California
5. Department of Pathology, Microbiology and Immunology, School of Veterinary MedicineDivision of Infectious Diseases