1. Center for Biologics Evaluation and Research, US Food and Drug Administration , Silver Spring, Maryland
2. Department of Microbiology and Immunology, Uniformed Services University of the Health Sciences , Bethesda, Maryland
3. Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc , Bethesda, Maryland
4. Department of Preventive Medicine and Biostatistics, Infectious Disease Clinical Research Program, Uniformed Services University of the Health Sciences , Bethesda, Maryland