1. Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center , Nashville, Tennessee, USA
2. Department of Medicine, Vanderbilt University School of Medicine , Nashville, Tennessee, USA
3. Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center , Nashville, Tennessee, USA
4. Veterans Affairs Tennessee Valley Healthcare System , Nashville, Tennessee, USA