1. Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee 38105
2. VA Medical Center and MidSouth Center for Biodefense and Security, Memphis, Tennessee 38104
3. Hartwell Center for Biotechnology and Bioinformatics, St. Jude Children's Research Hospital, Memphis, Tennessee 38105
4. Department of Anatomy and Neurobiology, University of Tennessee Health Science Center, Memphis, Tennessee 38105