1. Walter Reed Army Institute of Research, Silver Spring, Maryland, USACurrent affiliation: Northwest Center for Public Health Practice, Seattle, Washington, USA
2. Walter Reed Army Institute of Research, Silver Spring, Maryland, USA
3. Air Force Institute for Operational Health, Brooks City Base, Texas, USA
4. Walter Reed Army Institute of Research, Silver Spring, Maryland, USACurrent affiliation: US Census Bureau, Suitland, Maryland, USA
5. Walter Reed Army Institute of Research, Silver Spring, Maryland, USACurrent affiliation: Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA