1. Department of Microbiology & Immunology, Brody School of Medicine at East Carolina University, Greenville, NC 27834, USA
2. Division of Infectious Diseases, Brody School of Medicine at East Carolina University, Greenville, NC 27834, USA
3. Department of Internal Medicine (Division of Pulmonary & Critical Care Medicine), Brody School of Medicine at East Carolina University, Greenville, NC 27834, USA