1. Infectious Disease Clinical Research Program, Department of Preventive Medicine and Biostatistics, School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA.
2. Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, Maryland, USA.
3. Marimac Insight, Columbia, Maryland, USA.
4. Department of Epidemiology, Milken Institute School of Public Health, George Washington University, Washington, District of Columbia, USA.
5. Division of Infectious Diseases, Walter Reed National Military Medical Center, Bethesda, Maryland, USA.
6. Infectious Disease Service, Brooke Army Medical Center, Fort Sam Houston, Texas, USA.
7. Division of Infectious Diseases, Madigan Army Medical Center, Joint Base Lewis McChord, Washington, District of Columbia, USA.
8. Division of Infectious Diseases, Naval Medical Center Portsmouth, Portsmouth, Virginia, USA.
9. Division of Infectious Diseases, Naval Medical Center San Diego, San Diego, California, USA.