1. Department of Veterinary Pathobiology, College of Veterinary Medicine; The University of Missouri, Columbia, Missouri, USA.
2. Department of Molecular Microbiology and Immunology, School of Medicine; The University of Missouri, Columbia, Missouri, USA.
3. Department of Chemical and Biomedical Engineering, College of Engineering; The University of Missouri, Columbia, Missouri, USA.
4. Department of Neurology, School of Medicine; The University of Missouri, Columbia, Missouri, USA.
5. Department of Biomedical Sciences, College of Veterinary Medicine; The University of Missouri, Columbia, Missouri, USA.