1. Center for Predictive Medicine for Biodefense and Emerging Infectious Diseases, University of Louisville, Louisville, Kentucky, USA
2. Department of Microbiology and Immunology, University of Louisville School of Medicine, Louisville, Kentucky, USA
3. Department of Radiology, University of Louisville School of Medicine, Louisville, Kentucky, USA
4. Department of Medicine, University of Wisconsin, Madison, Wisconsin, USA
5. Dr. Bing Zhang Department of Statistics, University of Kentucky, Lexington, Kentucky, USA