1. Department of Epidemiology, Emory University Rollins School of Public Health, Atlanta, Georgia, USA.
2. Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA.
3. Infectious Diseases Program, Grady Health System, Atlanta, Georgia, USA.
4. Division of Infectious Diseases, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA.
5. Department of Global Health, Emory University Rollins School of Public Health, Atlanta, Georgia, USA.
6. Infectious Diseases Clinic, Atlanta Veterans Affairs Medical Center, Decatur, Georgia, USA.
7. The Emory Vaccine Center, Atlanta, Georgia, USA.