Affiliation: | 1. Department of Genetics, Development and Cell Biology, Iowa State University, Ames, Iowa;2. Immunobiology Graduate Program, Iowa State University, Ames, Iowa;3. Neuroscience Graduate Program, Iowa State University, Ames, Iowa;4. Department of Biomedical Sciences, Iowa State University College of Veterinary Medicine, Ames, Iowa;5. Virus and Prion Research Unit, National Animal Disease Center, US Department of Agriculture, Agricultural Research Service, Ames, Iowa |