1. Department of Biological Sciences, Vanderbilt University , Nashville, Tennessee, USA
2. Vanderbilt Evolutionary Studies Initiative, Vanderbilt University , Nashville, Tennessee, USA
3. Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center , Nashville, Tennessee, USA
4. Vanderbilt Institute for Infection, Immunology, and Inflammation , Nashville, Tennessee, USA