1. Department of Medicine, Uniformed Services University of Health Sciences, Bethesda, Maryland;
2. Clinical Trials Center, Walter Reed Army Institute of Research, Silver Spring, Maryland;
3. 1st Area Medical Laboratory, Aberdeen Proving Grounds, Maryland;
4. Infectious Disease Clinical Research Program, Department of Preventive Medicine and Biostatistics, Uniformed Services University of Health Sciences, Bethesda, Maryland;
5. Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, Maryland;
6. Department of Pediatrics, Uniformed Services University of Health Sciences, Bethesda, Maryland;
7. Infectious Disease Service, Department of Medicine, Brooke Army Medical Center, Fort Sam Houston, Texas