1. Divisions of Animal Resources, Emory University School of Medicine, Atlanta, Georgia, USA
2. Divisions of Microbiology and Immunology, Departments of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia, USA
3. Divisions of Microbiology and Immunology, Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia, USA
4. Departments of Neuroscience and Behavior Program, Department of Psychology, University of Massachusetts, Amherst, Massachusetts, USA
5. Divisions of Animal Resources, Developmental and Cognitive Neurosciences, Yerkes National Primate Research Center, Emory University School of Medicine, Atlanta, Georgia, USA; Departments of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia, USA. Kelly.f.ethun@emory.edu