1. Enteric Disease Department, Infectious Disease Directorate, Naval Medical Research Center, Silver Spring, Maryland
2. Biological Defense Research Directorate, Naval Medical Research Center, Fort Detrick, Maryland
3. Henry M. Jackson Foundation, Bethesda, Maryland
4. Pediatric Infectious Diseases, Children’s National Medical Center, Washington, DC
5. Department of Pediatrics, George Washington University School of Medicine and Health Sciences, Washington, DC
6. Walter Reed National Military Medical Center, Bethesda, Maryland