1. Department of Pathology, The University of Texas Medical Branch, 301 University Boulevard, Galveston, TX 77555, USA
2. The Sealy Center for Vaccine Development, The University of Texas Medical Branch, 301 University Boulevard, Galveston, TX 77555, USA
3. The Center for Biodefense & Emerging Infectious Diseases, The University of Texas Medical Branch, 301 University Boulevard, Galveston, TX 77555, USA